Synonyms of the word

unconfident

• adj. Not confident.

diffident

• adj. (archaic): Lacking confidence in others; distrustful.
• adj. Lacking confidence in oneself; distrustful of one's own powers; not self-reliant; timid; modest; bashful;…

shy

• adj. Easily frightened; timid.
• adj. Reserved; disinclined to familiar approach.
• adj. Cautious; wary; suspicious.
• adj. (informal) Short, insufficient or less than.
• adj. Embarrassed.
• v. (intransitive) To avoid due to timidness or caution.
• v. (intransitive) To jump back in fear.
• v. (transitive) to throw sideways with a jerk; to fling.
• n. An act of throwing.
• n. A place for throwing.
• n. A sudden start aside, as by a horse.
• n. In the Eton College wall game, a point scored by lifting the ball against the wall in the calx.

timid

• adj. Lacking in courage or confidence.

unsure

• adj. uncertain.
• adj. unstable or precarious.