diffident
Cross references: 1. shy dif.fi.dent \-d*nt, -.dent\ aj [L diffident-, diffidens, prp. of diffidere to distrust, fr.]dis- + fidere to trust - more at BIDE archaic 1: DISTRUSTFUL 2: lacking confidence : TIMID 3: RESERVED, UNASSERTIVE - dif.fi.dent.ly av