thievish
Thievish is an adjective used to describe someone or something characterized by or resembling theft. It implies a tendency towards dishonesty, slyness, or furtiveness, particularly in relation to acquiring possessions or information that does not belong to one. The word often carries a negative connotation, suggesting a lack of integrity or morality.
The term can be applied to actions, behaviors, or even physical appearances that evoke suspicion of wrongdoing.