afraid apprehensive bashful cautious circumspect coy demure diffident fearful hesitant humble introverted modest nervous reluctant reticent self-effacing sheepish suspicious timid wary disinclined indisposed introvert loner recessive reserved retiring shrinking averse backward chary conscious distrustful loath shamefaced skittish unassertive unassured uneager uneffusive unresponsive unsocial unwilling