This is the 639th most frequent Thai word.
เย
The Thai word "เย" is a slang term meaning "to have sex."
In this sentence, "เยอะ" means "a lot of" or "many," indicating the quantity of work.
เขามีงานเยอะมากที่ต้องทำวันนี้
He has a lot of work to do today.
Here, "เยี่ยม" means "great" or "excellent." The root "เย" contributes to the creation of adjectives.
ฉันหวังว่าโปรเจ็กต์นี้จะเยี่ยมมาก
I hope this project will turn out really great.
Although the main term here is "สนุกสนาน," the discussion about usage might include "เย" in idiomatic or colloquial speech, indirectly related to slang or expressions.