Translation guide
Describes speaking in a low, quiet voice, often to avoid being overheard or to convey a subdued tone.
To say something quietly, often to avoid being overheard or to express a subdued emotion.
The most common and neutral way to say 'in a low voice' or 'in undertones'. Used in everyday conversation.
He muttered something in undertones.
Please speak in a low voice.
Implies whispering or speaking in hushed tones, often secretively. Slightly more specific than 小声で.
They were gossiping in undertones.
Literally 'in a low voice', focusing on the pitch rather than the volume. Can be used for undertones but may also just mean a deep voice.
He answered in undertones.
Means 'lowering one's voice' intentionally, often to avoid being heard. Conveys a deliberate action.
She told me the secret in undertones.
An onomatopoeic adverb for muttering or speaking in a low, indistinct voice, often to oneself.
He was complaining in undertones.