adj. 25B6; adjective
she was terribly clumsy : AWKWARD, uncoordinated, ungainly, graceless, inelegant; inept, maladroit, unskilful, unhandy, accident-prone, like a bull in a china shop, all fingers and thumbs; informal cack-handed, ham-fisted, butterfingered, having two left feet; N. Amer. informal klutzy.
a clumsy contraption : UNWIELDY, cumbersome, bulky, awkward.
a clumsy remark : GAUCHE, awkward, graceless; unsubtle, uncouth, boorish, crass; tactless, insensitive, thoughtless, undiplomatic, indelicate, ill-judged.
graceful, elegant, tactful.