v feel about uncertainly or blindly
v make one's way clumsily or blindly
v handle clumsily
v make a mess of, destroy or ruin
v drop or juggle or fail to play cleanly a grounder
s showing lack of skill or aptitude
v. （笨拙地）摸索或处理（某事物）( fumble的现在分词 ); 乱摸, 笨拙地弄; 使落下