狡い
ずるい · zurui · JLPT N2 · i-adj
sly
🦊 狡い sounds like 'zu-rui': a fox (狐, kitsune) is the classic sly one, so zurui = fox-like cunning
The fox is the traditional trickster in Japanese folklore, so think of the fox's sly reputation when you meet ずるい. Its meaning covers cunning and dishonest cleverness.