Person Who Spoils Someone Else's Fun
This page is the CodyCross answer for the clue below from Greece, Group 667, Puzzle 1 (Temple of Poseidon).
Question is: Person Who Spoils Someone Else's Fun
and the answer is: KILLJOY
Word Meaning:
KILLJOY — (occasionally endearing, derogatory) A person who is anti-fun, or prevents others from having fun.
Definitions from Wiktionary.