n.
Pronunciation: ' m ə -t ə r
Function: verb
Etymology: Middle English muteren, of imitative origin
Date: 14th century
intransitive verb
1 : to utter sounds or words indistinctly or with a low voice and with the lips partly closed
2 : to murmur complainingly or angrily : GRUMBLE
transitive verb : to utter especially in a low or imperfectly articulated manner
– mutter noun
– mut · ter · er \ -t ə r- ə r \ noun