Confident in Thai

“Confident” in Thai is มั่นใจmân-jai; you'll also hear แน่ใจnâe-jai (sure).

มั่นใจ mân-jai

confident, sure adjective

mân falling
jai mid

Falling: start high and drop clearly, like a firm “No!”

Parts: มั่นmân firm, steady ใจjai heart

แน่ใจ nâe-jai

sure, certain adjective

nâe falling
jai mid

Falling: start high and drop clearly, like a firm “No!”

How to use it

มั่นใจmân-jai, "a firm heart", is confident or sure: about a decision, an answer, yourself. Self-confidence is ความมั่นใจkwaam mân-jai, and someone sure of themselves is มั่นใจในตัวเองmân-jai nai dtua-eeng. For plain "sure", Thais say แน่ใจnâe-jai: แน่ใจนะnâe-jai ná, are you sure? Not sure is ไม่แน่ใจmâi nâe-jai.

Other spellings you'll see

There's no single official way to write Thai in English letters. We mark the tone of every syllable; online you'll also find:

mun jai
nae chai

More feelings in Thai

All feelings

มีความสุข mii kwaam-sùk Happy
to be happy
เสียใจ sǐa-jai Sad
ซึมเศร้า suem-sâo Depressed
เหงา ngǎo Lonely
คิดถึงบ้าน kít-tǔeng bâan Homesick
homesick (literally 'miss home')
ร้องไห้ ráwng-hâai Cry
to cry

Learn Thai with the free course

A complete course from your first phrase to real conversations, with audio for every word and AI speaking practice. Free, no sign-up needed.

Start the free course

Written by the Learn Thai For Free team
Audio: AI voices, quality-checked for tones