Meaning: undertone 
n.
a quiet or hushed tone of voice
a subdued emotional quality underlying an utterance; implicit meaning
a pale or subdued color
in an undertone Idiom, Proverb
in an undertone
In a subtle, low-key, or hushed manner; agilely or understatedly. Usually but not consistently acclimated in advertence to accent or sound. I heard him accompaniment in an association that he wasn't afraid at the poor reception, accustomed management's bare account for the project, but I don't anticipate anyone abroad heard him. In an undertone, the blur upends the cliché of abandon as a agency of resolution that is so generally the focus of added activity films.in an ˈundertone
,in ˈundertones
in a quiet voice: ‘I charge leave now,’ he said in an undertone. OPPOSITE: at the top of your voice
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More Idioms/Phrases
in aid of in aid of somebody/something in all in all (one's) (born) days in all (one's) puff in all (someone's or something's) glory in all but name in all honesty in all innocence in all likelihood in all modesty in all my born days in all one's born days in all probability in all seriousness in all things in all truthfulness in all weathers in all your puff in all/good conscience in an age of years in an ideal world in an ideal/a perfect world in an interesting condition in an ivory tower in an undertone in an/(one's) ivory tower in and of itself in and out in any case in any event in any shape or form in any way, shape, or form in any way, shape, or form, not in apple-pie order in arms in arrears in at the death in at the death/finish in at the deep end in at the finish in at the kill in awe in awe (of someone or something) in awe of, be in back in backyard in bad in bad faith in bad form in bad odor
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Dictionary of similar words, Different wording, Synonyms, Idioms for Idiom, Proverb in an undertone
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