clueless

adj (infml derog 口, 贬) stupid or incompetent 愚笨的; 无能的: He's absolutely clueless. 他毫无本事.

clove, clove hitch, cloven, clover, clover-leaf, clown, clownish, cloy, cloying, cloze test, club, club car, club sandwich, club-foot, club-footed, club-root, clubbable, clubhouse, cluck, clue, clump, clumsily, clumsiness, clumsy, clung, clunk, cluster, clutch, clutter, cm, Cmdr, Cmdre, CND, CO, co-, co-op, co op, co-operate, co-operate, cooperate, co-operation, cooperation, co-operative,