Open English Wordnet
Adjectives
(s)bungling, clumsy, fumbling, incompetentshowing lack of skill or aptitude“a bungling workman”, “did a clumsy job”, “his fumbling attempt to put up a shelf”
(s)bumbling, bungling, butterfingered, ham-fisted, ham-handed, handless, heavy-handed, left-handedlacking physical movement skills, especially with the hands“a bumbling mechanic”, “a bungling performance”, “ham-handed governmental interference”, “could scarcely empty a scuttle of ashes, so handless was the poor creature” (Mary H. Vorse)