เหตุใด
hèet-daiMeaning
1AdverbB1
why; for what reason (formal)
A formal/literary interrogative meaning “why; for what reason”; more common in writing. Colloquial equivalent: ทำไมทำไมtam-mai1why (question word)2why (expressing disbelief/complaint).
Examples
เหตุใดhèet-daiเหตุใดhèet-daiwhy; for what reason (formal)คุณkunคุณkun1you (polite)2Mr.; Ms.; Mrs. (title)3quality; virtue; meritถึงtʉ̌ngถึงtʉ̌ng1to; until; up to2[to] arrive; reach3to; toward (recipient/goal)4even if; even though5as much as; as many as; to the point of6only then; then as a result (informal)7about; concerning; regardingไม่mâiไม่mâi1not (negator)2no (reply)มาmaaมาmaa1[to] come; arrive2[to] come to (a state or situation)3past/as of now aspect markerโรงเรียนroong-riianโรงเรียนroong-riian1school (institution)2school (building)เมื่อวานนี้mʉ̂ʉa-waan-níiเมื่อวานนี้mʉ̂ʉa-waan-níi1yesterday (the day before today)2yesterday; on the previous day
For what reason did you not come to school yesterday?
3 more examplesShow less
ผมpǒmไม่mâiเข้าใจว่าkâo-jai-wâaเหตุใดhèet-daiเขาkǎoถึงtʉ̌ngตัดสินใจdtàt-sǐn-jaiลาออกlaa-ɔ̀ɔkกะทันหันgà-tan-hǎn
I don't understand for what reason he decided to resign so suddenly.
ในnaiรายงานraai-ngaanไม่ได้mâi-dâaiชี้แจงchíi-jɛɛngว่าwâaเหตุใดhèet-daiโครงการkroong-gaanจึงjʉngประสบbprà-sòpกับgàpความล่าช้าkwaam-lâa-cháa
The report did not clarify why the project experienced delays.
นักประวัติศาสตร์nák bprà-wàt-sàatยังคงyang kongถกเถียงกันtòk tĭiang ganว่าwâaเหตุใดhèt daiอาณาจักรaa-naa-jàkที่têeยิ่งใหญ่yîng yàiในอดีตnai à-dèetจึงjeungล่มสลายlôm sà-lăaiลงlong
Historians still debate for what reason the great empires of the past collapsed.
Tones
See how the spelling sets each syllable's tone, step by step.
Why is เหตุใด said เหด-ใด?
hèet-dai
The tone rules below use the spoken syllables.
2 syllables · pick one to see its rule
How the tone is decided
- Consonant classHigh class
- Tone markNo tone mark
- Syllable endingDead syllableEnds in -ต, a stop, so it is dead.
High class consonants
ขฃฉฐถผฝศษสห
Result
Low tone
hèet
Starts low and stays low, easing slightly down.
High class + No tone mark + Dead syllable → Low
Tone chart
Every class and spelling pattern, with this syllable outlined.
| Mid class | High class | Low class | |
|---|---|---|---|
| No mark + live | Mid | Rising | Mid |
| No mark + dead short | Low | Low | High |
| No mark + dead long | Low | Low | Falling |
| Mai ek | Low | Low | Falling |
| Mai tho | Falling | Falling | High |
| Mai tri | High | — | — |
| Mai chattawa | Rising | — | — |
Word Breakdown
เหตุhèetเหตุhèet1cause; reason2incident; occurrence (formal)3Buddhist cause (hetu)cause; reasonPart 1
+
เหตุใดhèet-daiเหตุใดhèet-daiwhy; for what reason (formal)why; for what reason (formal)Word