The /ay/ sound can be written with two different symbols ไ (/máy máˑlaay/) and ใ (/máy múan/).
Both are written before the consonant to which they relate. Almost all words written with
ไ and ใ do not have a final consonant. One obvious exception is ไทย (/thay/, Thai). The final
ย has no effect upon the pronunciation.
ใ is only used for 20 words, though some of them are very common, such as
ใช้ (/cháy/, to use), ใน (/nay/, in) and ให้ (/hây/, to give/let/allow/have someone do something, &c.).
Now try reading these words:
ไร่\/rây/\rai, unit of area equal to 1,600 square metres\1^
ใส่\/sày/\to put on (e.g. clothes)\1^