no

The word "no" in Thai is primarily represented by "ไม่" (mai), which acts as the universal negator. It is placed before verbs, adjectives, or adverbs to negate them, functioning much like "not" or "do not" in English. When used as a standalone response to a yes/no question, it is typically paired with a polite particle like "ครับ" (krap) or "ค่ะ" (kha) to soften the tone. While "ไม่" is the standard negation, Thai speakers often use "ไม่" in combination with "ใช่" (chai) to form "ไม่ใช่" (mai chai) when denying identity or equivalence (meaning "it is not that"). It is important to remember that "no" in Thai is never used alone in a sentence; it must always modify a verb or be part of a larger negation structure to be grammatically correct.
In conversation
Declining an offer
ไปกินข้าวกันไหม?
Do you want to go eat?
ไม่ครับ ขอบคุณครับ
No, thank you.
Adding 'krap' makes the refusal polite.
Clarifying a misunderstanding
คุณคือสมชายใช่ไหม?
Are you Somchai?
ไม่ใช่ครับ ผมชื่อสมศักดิ์
No, I am Somsak.
Use 'mai chai' when negating nouns or identities.
Examples
ฉันไม่หิว
I am not hungry.
เขาไม่ไปทำงานวันนี้
He is not going to work today.
ไม่ใช่เรื่องของฉันสักหน่อย
It is not my business at all.