mumble

名词 mumble:

1. a soft indistinct utterance

动词 mumble:

1. talk indistinctly; usually in a low voice
   同义词：mutter, maunder, mussitate
2. grind with the gums; chew without teeth and with great difficulty
   同义词：gum

1. She mumbled that she didn't want to get up yet.
   她咕哝着说还不想起床。
2. He always mumbles when he's embarrassed.
   他感到难为情时就说话不清楚了。
3. I heard an incoherent mumble.
   我听到了不连贯的低语声。

mum.ble

v.（动词）
mum.bled,mum.bling,mum.bles
v.tr.（及物动词）
To utter indistinctly by lowering the voice or partially closing the mouth:
咕哝：通过降低声音或半闭着嘴的方式不清晰地说出：
例句：
mumbled an insincere apology.
含糊地说出无诚意的道歉

To chew slowly or ineffectively without or as if without teeth.
抿着嘴嚼：用没有或好象没有牙齿的牙床慢慢地咀嚼
v.intr.（不及物动词）
To speak words indistinctly, as by lowering the voice or partially closing the mouth.
咕哝：通过降低声音或半闭着嘴的方式不清晰地讲话
To chew food slowly or ineffectively, as if with the gums.
抿着嘴嚼：好象是用牙床慢慢地咀嚼食物
n.（名词）
A low, indistinct sound or utterance.
含糊的话：低的不清晰的声音或语调

来源：
Middle English momelen
中古英语 momelen
from Middle Dutch mommelen
源自 中古荷兰语 mommelen

【引伸】
mum.bler
n.（名词）
mum.bly
adj.（形容词）