How to Say “I agree” in Thai
เห็นด้วย
hěn-dûay
I agree
ค่ะ and ครับ are polite particles — they depend on the speaker's gender, not the listener's.
When to use it
เห็น (hěn) means "to see/to think," ด้วย (dûay) means "also/with." Literally "I see it that way too." The opposite is ไม่เห็นด้วย (mâi-hěn-dûay) — "I disagree" — though Thais often soften disagreement with a smile and indirect phrasing rather than stating it directly.
Why you've seen it spelled differently
You may have seen เห็นด้วย written as: hen duay, hern duay, hen duai.
There is no single standard for writing Thai in the Roman alphabet — phrasebooks, road signs, and tourist guides each follow a different system, and many just invent their own spellings. The romanization on this page uses a consistent IPA-based system that marks all five tones and distinguishes short from long vowels. The same word always gets the same spelling. Paste any Thai to see it romanized →
Related phrases
Get the free Thai starter pack
Join the list for the beginner starter path, practice resources, and early access to the full lesson library.