From English-日本語 (にほんご) FreeDict+WikDict dictionary ver. 2022.11.18: mutter //ˈmʌtə// //ˈmʌtɚ// <v> 呟く, 囁く 2. speak incoherently 3. speak under one's breath
mutter //ˈmʌtə// //ˈmʌtɚ// <v> 呟く, 囁く 2. speak incoherently 3. speak under one's breath