Hum
来自Big Physics
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late Middle English: imitative.
wiktionary
From Middle English hummen(“to hum, buzz, drone, make a murmuring sound to cover embarrassment”); akin to Dutch hommelen(“to bumble, buzz”), dialectal Dutch hommen(“to buzz, hum”), Middle High German hummen(“to hum”), probably ultimately of imitative origin.
etymonline
hum (v.)
late 14c., hommen "make a murmuring sound to cover embarrassment," later hummen "to buzz, drone" (early 15c.), probably of imitative origin. Sense of "sing with closed lips" is first attested late 15c.; that of "be busy and active" is 1884, perhaps on analogy of a beehive. Related: Hummed.
hum (n.)
mid-15c., "a murmuring sound made with the voice," from hum (v.).
