Many people accidentally write “thier” instead of “their.” Since the words look similar, this is one of the most common spelling mistakes in English.
👉 The correct spelling is: their
❌ Thier is incorrect.
In simple terms, their is used to show that something belongs to people or things.
👉 For example:
- The students forgot their books.
- The dogs wagged their tails.
Learning the correct spelling helps improve your grammar and writing skills.
What Does “Their” Mean?
Their is a possessive word.
👉 It shows ownership or belonging.
Examples:
- The children cleaned their room.
- Sarah and Ali packed their bags.
- The birds built their nest.
- People should respect their teachers.
Why “Thier” Is Incorrect
❌ Thier is a spelling mistake.
✔️ The correct spelling is:
👉 their
The letters should appear in this order:
- t-h-e-i-r
Their vs Thier (Quick Comparison)
| Word | Correct? | Meaning |
|---|---|---|
| Thier | ❌ No | Incorrect spelling |
| Their | ✔️ Yes | Shows ownership |
Easy Memory Trick
👉 Think:
“They own it → their.”
The word their begins with the, just like they.
Another simple trick:
👉 Remember the order:
- e comes before i
✔️ th-ei-r
Sentence Examples
Correct Usage
- The kids finished their homework.
- My friends brought their lunch.
- The players wore their uniforms.
- The cats slept in their basket.
Incorrect Usage
- ❌ The kids finished thier homework.
- ❌ The birds built thier nest.
Common Mistakes
❌ I like thier new house.
✔️ I like their new house.
❌ The students lost thier pencils.
✔️ The students lost their pencils.
Practice Time
Fill in the blanks:
- The children cleaned ______ room.
- My friends brought ______ books.
- The dogs wagged ______ tails.
- The players wore ______ uniforms.
- The birds built ______ nest.
Answers:
- their
- their
- their
- their
- their
Final Thought
The correct spelling is always their, while thier is incorrect.
Since this mistake is very common, practicing the correct letter order can really help your writing improve.
Use simple memory tricks and sentence practice often, and soon spelling their correctly will become easy and natural for you.
William Cooper is a U.S.-based content writer at Aslikee who focuses on creating clear, informative, and user-friendly content. He is committed to delivering information that is accurate, practical, and easy for readers to understand.
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