- (archaic) Lacking confidence in others; distrustful.
- Lacking self-confidence; timid; modest
- 1749, Henry Fielding, chapter VIII, in The History of Tom Jones, a Foundling. In Six Volumes, volume (please specify |volume=I to VI), London: Printed by A[ndrew] Millar, […], OCLC 928184292, book IV:
- Having therefore—but hold, as we are diffident of our own abilities, let us here invite a superior power to our assistance.
lacking confidence in oneself