lacking grace in movement or posture; "a gawky lad with long ungainly legs"; "clumsy fingers"; "what an ungainly creature a giraffe is"; "heaved his unwieldy figure out of his chair"仕草や姿勢において優雅さを欠いた無細工
例:heaved his unwieldy figure out of his chair 彼の、あまりに重すぎて手に負えないほどの体をいすから持ち上げた