by heart (known perfectly) adverb
- kûen falling
- jai mid
- Falling: start high and drop clearly, like a firm “No!”
จำขึ้นใจjam kûen-jai = to know by heart.
You'll hear it in Khuen Jai (ขึ้นใจ).
How to use it
ขึ้นใจkûen-jai, "up into the heart", comes after จำjam, to remember: จำได้ขึ้นใจjam dâi kûen-jai is knowing something by heart, a phone number, a song, the way home. Learning by saying something over and over, as children do with their times tables, is ท่องจำtâwng-jam, and simply remembering is จำได้jam dâi.
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:
- khuen jai
- keun jai
- kheun jai
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More work and study in Thai
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Written by the Learn Thai For Free team
Audio: AI voices, quality-checked for tones