She spoke over the afternoon hum of Serendipity, the famous Upper East Side ice-cream parlor.
DE, from the French, means "of" as in "from;" DO, like the deer, is the first tone you hum.
There was no shelling this time, but there was the hum of watchful drones.
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; humming. Humming-bird (1630s) so called from sound made by the rapid vibration of its wings.
There is a curious bird to see to, called a humming bird, no bigger then a great Beetle. [Thomas Morton, "New English Canaan," 1637]
mid-15c., from hum (v.).
A low, continuous murmur blended of many sounds.