怪しい

suspicious, dubious, questionable, dodgy, shady, fishy, doubtful, unsure, uncertain, unlikely, implausible, untrustworthy, unreliable, clumsy, awkward, shaky, poor, strange, weird, eerie, spooky, uncanny, ominous (e.g. weather), threatening, dangerous (e.g. financial situation), uncertain, suspicious (of a potential amorous relation), mysterious, bewitching, alluring, enticing, enchanting