lacking self-confidence; stood in the doorway diffident and abashed; problems that call for bold not timid responses; a very unsure young man

[ Syn: diffident , shy , timid ]

lacking or indicating lack of confidence or assurance; uncertain of his convictions; unsure of himself and his future; moving with uncertain (or unsure) steps; an uncertain smile; touched the ornaments with uncertain fingers

[ Syn: uncertain , uncertain , incertain , incertain ]