What is another word for sing in an undertone?
Pronunciation: [sˈɪŋ ɪn ɐn ˌʌndətˈə͡ʊn] (IPA) 
The phrase "sing in an undertone" can be replaced by different synonyms depending on the context. If the singer is trying to keep the singing secret or quiet, synonyms like "whisper-sing" or "murmur-sing" can be used. If the singer is intending to portray a sad or gloomy mood, synonyms like "hum mournfully" or "chant softly" will fit the description. Synonyms like "croon," "warble,""twitter," "chirp" or "trill" can also be used to refer to a soft, gentle form of singing in an undertone. The use of different synonyms for the phrase "sing in an undertone" can add depth and variety to the description of a scene.
