October 27, 2026
Karan and Vowel Length
แพทย์ is the trap I most want you to catch, because crossing out the ย is only halfway through the word. If you stop after that deletion and take the usual dead-syllable tone, you will read it low, and I think that answer feels right enough that it would slip past both of us.
Here is why it lands falling instead. Once the ย is gone, ท is the final and it makes the syllable dead, but พ is low class, so a dead syllable still has one more question to answer. Is the vowel short or long? แ- is long, and for a low-class dead syllable that means falling, so แพทย์ reads “phaaet” with a falling tone. You've seen that length split before on its own; the new part is remembering to run it after a การันต์ deletion has changed what the syllable is.
สิงห์ gives you the opposite lesson about ห. The ์ sits over the ห at the end, so that ห is simply deleted and it gives the syllable nothing, no sound and no class. That is different from a ห at the start of a syllable, which can stay silent and still lend its class. What remains in สิงห์ is ส, the vowel -ิ-, and ง as the final, which makes it live, and ส is high class on its own, so it reads “sing” with a rising tone.
ศุกร์, the word you will see in วันศุกร์ on calendars, is the steadier one to finish with. Delete the ร under the mark, let ก be the final, call it dead, and the high-class ศ gives you a low tone on “sook.”
I like these three together because the deletion is identical each time and the tones still come out low, falling, and rising. The mark tells you what to remove; what is left behind still decides everything after that.