Roget's Thesaurus: Entry 405 (Faintness)

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#405. Faintness. -- N. faintness &c. adj.; faint sound, whisper, breath; undertone, underbreath[obs]; murmur, hum, susurration; tinkle; " still small voice."

hoarseness &c. adj.; raucity[obs].

V. whisper, breathe, murmur, purl, hum, gurgle, ripple, babble, flow; tinkle; mutter &c. (speak imperfectly) 583; susurrate[obs].

steal on the ear; melt in the air, float on the air.

Adj. inaudible; scarcely audible, just audible; low, dull; stifled, muffled; hoarse, husky; gentle, soft, faint; floating; purling, flowing &c. v.; whispered &c. v.; liquid; soothing; dulcet &c. (melodious) 413; susurrant[obs], susurrous[obs].

Adv. in a whisper, with bated breath, sotto voce[Lat], between the teeth, aside; piano, pianissimo; d la sourdine[obs]; out of earshot inaudibly &c. adj.