41 Idioms for Trust
Trust is one of the most important things in life. It’s what makes friendships strong and families close. Sometimes saying “I trust you” isn’t enough. That’s where idioms come in. Idioms are special phrases that help us show how much we believe in someone. They make our words more interesting and help others understand our feelings better.
This article will look at idioms that show trust. These phrases can help you talk about belief and faith in others in a fun and meaningful way. You’ll also find a short activity to practice using these idioms in real situations.
Idioms for Trust
1. Take someone at their word
Meaning: Believe what someone says without questioning it.
Sentence Example: I take my best friend at her word when she says she’ll help me move. / Mom takes Dad at his word that he’ll fix the fence this weekend.
Other Ways to Say: Trust completely / Believe fully
2. Put your faith in someone
Meaning: Trust someone to do the right thing.
Sentence Example: I put my faith in my teacher to grade fairly. / We put our faith in the doctor to help Grandpa feel better.
Other Ways to Say: Trust in / Rely on
3. Count on someone
Meaning: Trust that someone will be there when you need them.
Sentence Example: I can always count on my sister to keep my secrets. / You can count on me to help with your homework.
Other Ways to Say: Depend on / Rely on
4. Trust someone with your life
Meaning: Have complete trust in someone.
Sentence Example: I trust my mom with my life when she drives in the snow. / The team trusts their coach with their lives during practice.
Other Ways to Say: Complete trust / Total faith
5. Bank on someone
Meaning: Trust someone completely to do something.
Sentence Example: I’m banking on my friend to save me a seat at lunch. / We’re banking on our captain to lead us to victory.
Other Ways to Say: Count on / Depend on
6. Have someone’s back
Meaning: Support and protect someone you trust.
Sentence Example: My brother always has my back when I need help. / I have your back if anyone gives you trouble.
Other Ways to Say: Support / Stand by
7. In good hands
Meaning: Safe with someone trustworthy.
Sentence Example: My pet is in good hands with my neighbor while I’m away. / The school project is in good hands with our team leader.
Other Ways to Say: Safe / Well cared for
8. Cross my heart
Meaning: Promise something is true.
Sentence Example: Cross my heart, I didn’t eat your cookies. / Cross my heart, I’ll be there for your birthday party.
Other Ways to Say: I promise / I swear
9. Word of honor
Meaning: A serious promise you can trust.
Sentence Example: I give you my word of honor that I’ll return your book tomorrow. / His word of honor means everything to our family.
Other Ways to Say: Solemn promise / Sacred word
10. Take a leap of faith
Meaning: Trust someone even when you’re not sure.
Sentence Example: I took a leap of faith and let my little brother help with cooking. / She took a leap of faith and trusted the new babysitter.
Other Ways to Say: Trust blindly / Take a chance
11. Honest as the day is long
Meaning: Someone who is completely trustworthy.
Sentence Example: My grandpa is honest as the day is long. / That store owner is honest as the day is long with his prices.
Other Ways to Say: Very honest / Completely trustworthy
12. True blue
Meaning: Loyal and trustworthy.
Sentence Example: My best friend is true blue she never lets me down. / Our dog is true blue, always protecting our family.
Other Ways to Say: Loyal / Faithful
13. Rock solid
Meaning: Very reliable and trustworthy. Sentence Example: Our friendship is rock solid, we trust each other completely. / My dad’s promises are rock solid he always keeps them. Other Ways to Say: Very reliable / Super trustworthy
14. Safe as houses
Meaning: Very safe and secure.
Sentence Example: My money is safe as houses with my mom. / Your secret is safe as houses with me.
Other Ways to Say: Very safe / Completely secure
15. Put all your eggs in one basket
Meaning: Trust one person with everything important. Sentence Example: I put all my eggs in one basket and trusted my partner with the whole project. / Don’t put all your eggs in one basket trust more than one friend. Other Ways to Say: Risk everything / Trust completely
16. Through thick and thin
Meaning: Trust someone in good times and bad times.
Sentence Example: My family sticks together through thick and thin. / Best friends trust each other through thick and thin.
Other Ways to Say: Always / In all situations
17. Stand by someone
Meaning: Stay loyal and supportive.
Sentence Example: I’ll stand by my friend even when others don’t believe her. / My teacher stands by me when I try my best.
Other Ways to Say: Support / Stay loyal
18. Put your money where your mouth is
Meaning: Show trust through actions, not just words.
Sentence Example: He put his money where his mouth is and trusted me with his bike. / I put my money where my mouth is and let her borrow my favorite book.
Other Ways to Say: Prove it / Show trust
19. Sleep like a baby
Meaning: Rest peacefully because you trust everything is okay.
Sentence Example: I sleep like a baby knowing my parents keep our house safe. / She sleeps like a baby because she trusts her roommate.
Other Ways to Say: Rest easy / Feel secure
20. Rest assured
Meaning: Feel confident and trust that something will be okay.
Sentence Example: Rest assured, I’ll take good care of your plants. / You can rest assured that your homework is safe with me.
Other Ways to Say: Don’t worry / Feel confident
21. Scout’s honor
Meaning: A promise that can be trusted.
Sentence Example: Scout’s honor, I didn’t break your toy. / I promise to help you study, scout’s honor.
Other Ways to Say: I promise / Trust me
22. Give someone the benefit of the doubt
Meaning: Choose to trust someone when you’re not sure.
Sentence Example: I gave my brother the benefit of the doubt about the missing candy. / Let’s give her the benefit of the doubt and trust her story.
Other Ways to Say: Trust anyway / Believe them
23. Take someone’s word for it
Meaning: Believe someone without proof.
Sentence Example: I’ll take your word for it that you finished your chores. / We took the teacher’s word for it about the test date.
Other Ways to Say: Trust them / Believe it
24. Pin your hopes on
Meaning: Trust someone with your dreams or wishes.
Sentence Example: I’m pinning my hopes on my coach to help me make the team. / We’re pinning our hopes on sunny weather for the picnic.
Other Ways to Say: Count on / Trust with
25. Keep faith with
Meaning: Stay loyal and trustworthy to someone.
Sentence Example: I keep faith with my promises to my little sister. / Good friends keep faith with each other always.
Other Ways to Say: Stay loyal / Keep promises
26. Swear by someone
Meaning: Have complete trust in someone.
Sentence Example: I swear by my mechanic he always fixes cars perfectly. / Mom swears by her doctor for good health advice.
Other Ways to Say: Trust completely / Believe in
27. Put stock in
Meaning: Trust and believe in someone or something.
Sentence Example: I put a lot of stock in my teacher’s advice about college. / Dad puts stock in hard work and honesty.
Other Ways to Say: Believe in / Value
28. Ride or die
Meaning: Loyal no matter what happens.
Sentence Example: My best friend is ride or die we trust each other completely. / Brothers are ride or die they stick together always.
Other Ways to Say: Forever loyal / Always there
29. Tried and true
Meaning: Tested and proven trustworthy.
Sentence Example: My grandma’s recipes are tried and true. / That old truck is tried and true it never breaks down.
Other Ways to Say: Proven reliable / Time-tested
30. Come hell or high water
Meaning: Trust someone will do something no matter what.
Sentence Example: Come hell or high water, my dad will pick me up from school. / I trust you’ll be there come hell or high water.
Other Ways to Say: No matter what / Always
31. Right-hand person
Meaning: Someone you trust most to help you.
Sentence Example: My sister is my right-hand person for planning parties. / The team captain’s right-hand person helps with every game.
Other Ways to Say: Most trusted helper / Best assistant
32. Birds of a feather
Meaning: People who trust and understand each other.
Sentence Example: My best friend and I are birds of a feather we think alike. / Those two are birds of a feather they trust each other completely.
Other Ways to Say: Similar people / Kindred spirits
33. Thick as thieves
Meaning: Very close and trusting friends.
Sentence Example: Those cousins are thick as thieves they share everything. / My teammates and I are thick as thieves we trust each other totally.
Other Ways to Say: Very close / Best friends
34. Hand on heart
Meaning: A sincere promise or statement.
Sentence Example: Hand on heart, I didn’t see who broke the window. / I can say, hand on heart, that she’s completely trustworthy.
Other Ways to Say: Honestly / Sincerely
35. Bet your bottom dollar
Meaning: Be completely sure you can trust something.
Sentence Example: You can bet your bottom dollar that my mom will make the best cookies. / I’d bet my bottom dollar that he’ll keep his promise.
Other Ways to Say: Be certain / Completely sure
36. Safe pair of hands
Meaning: Someone trustworthy to handle important things.
Sentence Example: The class pet is in a safe pair of hands with Jenny. / Your secret is in a safe pair of hands with me.
Other Ways to Say: Trustworthy person / Reliable care
37. Heart of gold
Meaning: Someone with a kind and trustworthy nature.
Sentence Example: My teacher has a heart of gold she always helps students. / Grandma has a heart of gold everyone trusts her.
Other Ways to Say: Very kind / Good person
38. Straight shooter
Meaning: Someone who is honest and trustworthy.
Sentence Example: My uncle is a straight shooter he always tells the truth. / We need a straight shooter to lead our group project.
Other Ways to Say: Honest person / Truthful
39. Above board
Meaning: Honest and trustworthy behavior.
Sentence Example: All of our club’s activities are above board. / His business deals are always above board and fair.
Other Ways to Say: Honest / Fair
40. On the level
Meaning: Honest and trustworthy.
Sentence Example: I promise I’m on the level about finishing my homework. / That store owner is on the level with all his customers.
Other Ways to Say: Being honest / Telling truth
41. Worth their salt
Meaning: Trustworthy and good at what they do.
Sentence Example: Any babysitter worth their salt would keep kids safe. / A friend worth their salt will keep your secrets.
Other Ways to Say: Reliable / Trustworthy
Exercise to Practice
- My brother is _______ he always keeps his promises.
- I can _______ my best friend to help me with anything.
- Mom says our money is _______ in the bank.
- _______, I didn’t break your toy.
- Our teacher is a _______ she’s always honest with us.
- I’ll _______ you even when others don’t believe you.
- You can _______ that Dad will pick us up on time.
- My grandpa is _______ everyone trusts him.
- I’m _______ on my team to win the game.
- She’s my _______ I trust her with everything.
- Those friends are _______ they never let each other down.
- I gave him the _______ about the missing homework.
- We’re _______ we stick together no matter what.
- _______, that was the best birthday party ever.
- Your pet is _______ with the neighbor.
Answer Key
- rock solid
- count on
- safe as houses
- Cross my heart
- straight shooter
- stand by
- bet your bottom dollar
- honest as the day is long
- banking
- right-hand person
- true blue
- benefit of the doubt
- thick as thieves
- Hand on heart
- in good hands
Conclusion
Using idioms about trust is a great way to show how much you believe in someone. They help your words feel stronger and more meaningful. Whether it’s for family, friends, or teachers, these phrases can help you express deep trust and loyalty.
Try to use a few of these idioms every day. A simple “I’m counting on you” or “you have my trust” can make someone feel valued and respected. Trust is built with small words and actions that show we care.
