lacking self-confidence; "stood in the doorway diffident
and abashed"; "problems that call for bold not timid responses"; "a very unsure young man" Synonym(s):diffident, shy, timid, unsure Antonym(s):confident
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" Synonym(s):uncertain, unsure, incertain Antonym(s):certain(p), sure