adj. 支支吾吾的；笨拙的
v. 摸索（fumble的ing形式）

[ adj ]
showing lack of skill or aptitude
<adj.all>
a bungling workmandid a clumsy job
his fumbling attempt to put up a shelf

Fumble \Fum"ble\, v. i. [imp. & p. p. {Fumbled}; p. pr. & vb. n.
{Fumbling}.] [Akin to D. fommelen to crumple, fumble, Sw.
fumla to fusuble, famla to grope, Dan. famle to grope,
fumble, Icel. falme, AS. folm palm of the hand. See {Feel},
and cf. {Fanble}, {Palm}.]
1. To feel or grope about; to make awkward attempts to do or
find something.

Adams now began to fumble in his pockets.
--Fielding.

2. To grope about in perplexity; to seek awkwardly; as, to
fumble for an excuse. --Dryden.

My understanding flutters and my memory fumbles.
--Chesterfield.

Alas! how he fumbles about the domains.
--Wordsworth.

3. To handle much; to play childishly; to turn over and over.

I saw him fumble with the sheets, and play with
flowers. --Shak.