| incertain |
| indecisive(uncertain, nervous, shy, doubtful, hesitant) |
| intimidated(nervous, shy, worried, fearful, afraid) |
| jittery(weak, shy, worried, afraid, apprehensive) |
| lowly(quiet, modest, humble, meek, unassuming) |
| mistrustful(nervous, insecure, unsure) |
| plain(adjective, soft, shy, meek, frugal) |
| reclusive(adjective, quiet, gentle, aloof, peaceful) |
| restless |
| secretive(adjective, secret, sneaky, stealthy) |
| silent(adjective, quiet, simple, indifferent, humble) |
| squeamish(unenthusiastic, unwilling, disinclined) |
| submissive(adjective, soft, shy, meek, frugal) |
| taciturn(adjective, quiet, gentle, aloof, peaceful) |
| trembling(nervous, shy, fearful) |
| uncomfortable |
| uneager(adjective, uncertain, modest, humble, shy) |
| uninvolved(adjective, indifferent, detached, aloof, distant) |
| unsocial(adjective, indifferent, modest, humble, detached) |
| vacillant(adjective, hesitant) |