grumble
Definition
To mutter complaints or protests; to complain in a low, muttering voice.
日本語 低い声で不満や抗議を囁く
Example
"He continued to grumble about the long lines at the grocery store."
To mutter complaints or protests; to complain in a low, muttering voice.
日本語 低い声で不満や抗議を囁く
"He continued to grumble about the long lines at the grocery store."