mistrustful

Mistrustful describes someone who lacks trust or confidence in others, often suspecting dishonesty or bad intentions.

A mistrustful person tends to be wary and skeptical, doubting the reliability or sincerity of people and their motives.

After being cheated by the contractor, she became mistrustful of anyone offering home repairs.

The word suggests an ongoing disposition rather than a momentary feeling, distinguishing it from the more situational suspicious.