ひきょう
cowardly; craven; unfair; mean
JLPT N2 Common word
Na-adjective, Noun
卑怯ひきょうなまねしないでよ。
Don't be a coward.
卑怯ひきょうな手段しゅだんにいらつく。
Underhandedness really gets on my nerves.
そんなふうに言いうなんて卑怯ひきょうだ。
It's mean of you to talk that way.