Vocabulary: Prefixes & Word Building

Vocabulary B1/B2

Prefixes & Word Building

The exhaustive guide to expanding your vocabulary! Learn how to attach small parts to the beginning of words to completely change their meaning.

The Spelling Trap 🎬

Watch Teacher Sopheak explain when to double the consonants! Remember, if a prefix ends with the same letter the root word begins with, you must write both letters (e.g., il + logical = illogical).

Vocab Check ⚡

ត្រួតពិនិត្យពាក្យ ⚡

Prefix Match

Which prefix means "not" or "opposite of" when added to the word "happy"?

(តើបុព្វបទមួយណាដែលមានន័យថា "មិន" នៅពេលបន្ថែមលើពាក្យ happy?)

Vocab Check ⚡

ត្រួតពិនិត្យពាក្យ ⚡

Prefix Meaning

What does the prefix "Pre-" mean?

(តើបុព្វបទ "Pre-" មានន័យដូចម្តេច?)

SPELLING TRAP ❌

Which spelling is correct when adding "ir-" to "responsible"?

(តើអក្ខរាវិរុទ្ធមួយណាដែលត្រឹមត្រូវ?)

Vocab Check ⚡

ត្រួតពិនិត្យពាក្យ ⚡

Word Building

If a school teaches in two languages, it is...

(ប្រសិនបើសាលារៀនបង្រៀនជាពីរភាសា តើវាជាសាលាអ្វី?)

Vocab Check ⚡

ត្រួតពិនិត្យពាក្យ ⚡

Prefix Match

Which prefix means "too much"?

(តើបុព្វបទមួយណាមានន័យថា "ច្រើនពេក"?)

Building Mission 🎯

អនុវត្តជាក់ស្តែង!

Create Opposites 🔍 Find three positive adjectives in English (like kind, possible, legal). Add the correct negative prefix to change their meaning.

Writing Mission 🎯

អនុវត្តជាក់ស្តែង!

Work Email ✍️ Write a professional sentence about "rebuilding" or "rewriting" a project document.

Speaking Mission 🎯

អនុវត្តជាក់ស្តែង!

Voice Note 🎤 Record yourself saying: "It is completely impossible and illogical to misunderstand the rules." Focus on pronouncing the double letters clearly!

Ask a Question 🙋‍♂️

តើអ្នកមានចម្ងល់មែនទេ? សួរគ្រូនៅទីនេះ!

U

Recent Questions

V

Vireak 3 hours ago

Teacher, how do I know when to use IN- or IM-?

Reply 👍 15

SP

Sopheak Pich Teacher 1 hour ago

Hi Vireak! Here is a great rule: We usually use "im-" before words that start with 'p', 'b', or 'm' (like im-possible, im-mature, im-balance). We use "in-" for most other letters! 🧠

N

Nita 5 hours ago

Can I add "re-" to any verb if I want to do it again?

Reply 👍 8

SP

Sopheak Pich Teacher 4 hours ago

Almost! You can add "re-" to many action verbs (rewrite, rebuild, rethink), but you cannot add it to stative verbs like "know" or "like". We don't say "reknow" or "relike". 🚫