動詞 bumble:

1. make a mess of, destroy or ruin
   同義詞：botch, bodge, fumble, botch up, muff, blow, flub, screw up, ball up, spoil, muck up, bungle, fluff, bollix, bollix up, bollocks, bollocks up, bobble, mishandle, louse up, foul up, mess up, fuck up
2. walk unsteadily
   同義詞：stumble, falter
3. speak haltingly
   同義詞：stutter, stammer, falter

1. He didn't bumble for the honeyed words of the landlord.
   他沒有被這個地主的甜言蜜語所欺騙。
2. The professor bumbled absent-mindedly along the road.
   教授心不在焉地沿途瞎遛。
3. What are you bumbling (on) about?
   你顛三倒四地說些什麼呀?

bumble

v.（動詞）
bum.bled,bum.bling,bum.bles
v.intr.（不及物動詞）
To speak in a faltering manner.
結(jié)結(jié)巴巴地說
To move or proceed clumsily.See Synonyms at blunder
踉蹌：笨拙地移動或前行參見 blunder
v.tr.（及物動詞）
To bungle; botch.
弄糟；笨拙

來源：
Perhaps blend of bungle
可能混合了 bungle
stumble
stumble

bumble
bumble 2

v.intr.（不及物動詞）
bum.bled,bum.bling,bum.bles
To make a humming or droning sound; buzz.
發(fā)出嗡嗡聲：發(fā)出嗡嗡的或哼哼地響聲；發(fā)出嗡嗡聲
n.（名詞）
A humming or droning sound; a buzz.
嗡嗡聲或哼哼聲；嗡嗡叫

來源：
Middle English bomblen [of imitative origin]
中古英語 bomblen [象聲語源]