Diffident

Part of speech: adjective (a.)

1. Wanting confidence in others; distrustful. [Archaic] You were always extremely diffident of their success. Melmoth.

2. Wanting confidence in one's self; distrustful of one's own powers; not self-reliant; timid; modest; bashful; characterized by modest reserve. The diffident maidens, Folding their hands in prayer. Longfellow.

Synonyms: Distrustful; suspicious; hesitating; doubtful; modest; bashful; lowly; reserved.