callow
Cross references: 1. rude cal.low \'kal-(.)o-, -*(-w)\ \'kal-o--n*s, -*-n*s\ aj [ME calu bald, fr. OE; akin to OHG kalo bald] of a bird 1: not yet having enough feathers to fly 2: lacking adult sophistication : IMMATURE {~ youth} - cal.low.ness n