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Everyday expressions

Not sure in Thai

“Not sure” in Thai is ไม่แน่ใจmâi nâe-jai.

ไม่แน่ใจ mâi nâe-jai

not sure; I'm not sure phrase

  • mâi falling
  • nâe falling
  • jai mid
  • Falling: start high and drop clearly, like a firm “No!”
Parts: ไม่mâi not แน่ใจnâe-jai sure, certain

Also a gentle way to doubt what someone said: ไม่แน่ใจนะmâi nâe-jai ná (I'm not so sure about that).

Taught in Unit 22 · Lesson 1: I think… because… of the free course.

Practise it free

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:

  • mai nae chai

More everyday expressions in Thai

All everyday expressions
  • สวัสดี sà-wàt-dii Hello
  • ยินดีต้อนรับ yin-dii dtâwn-ráp Welcome
  • ขอบคุณ kàwp-kun Thank you
  • ขอโทษ kǎw-tôot Sorry
  • ไม่เป็นไร mâi bpen rai Never mind

    it's okay

  • ใช่ châi Yes

Learn this word in Unit 22, free

Unit 22 · What do you think? · I think… because…. Short lessons with audio for every word, speaking practice and spaced review. No sign-up needed.

Practise it free (2 min) See Unit 22

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