I-adjective (keiyoushi)
dirty; filthy; foul; unclean
ジャックは私に汚いいたずらをした。Jack played a dirty trick on me. disordered; messy; untidy; poor (e.g. handwriting)
indecent (language, etc.); dirty; vulgar; coarse
dastardly; mean; base; underhanded
stingy; greedy
Also written 穢い【きたない】