arrested backward behindhand callow coarse crude defective deficient embryonic failing hypoplastic immature in arrear in arrears in default in embryo in ovo in short supply in the rough inadequate incomplete infant lacking missing needing oversimple part partial patchy reductionistic reductive rough roughcast roughhewn rude rudimental rudimentary scant scanty scrappy short shy simplistic sketchy stunted unblown uncultivated uncultured uncut undeveloped unfashioned unfinished unformed unhewn unlabored unlicked unpolished unprocessed unprogressive unrefined untreated unworked unwrought wanting