Etymology

thrum

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Today it means: A thrumming sound; a hum or vibration. Full definition →

Middle English thrum ← Old English *þrum ← Proto-Germanic *þrumą
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thrum · noun, verb1

Imitative.

thrum · noun, adjective, verb2

  1. Proto-Germanic · inherited from*þrumą
  2. Old English · inherited from*þrum
  3. Middle English · inherited fromthrum
  4. English todaythrum

From Middle English thrum, throm (> Anglo-French trome), from Old English *þrum (found in tungeþrum (“ligament of the tongue”)) from Proto-Germanic *þrumą. Cognate with German Trumm, Trümmer and Old Norse þrǫmr (“edge, brim”), and more distantly to Latin termen.

thrum · noun3

Apparently a reduced form of the stem of threepenny/threepence through a sequence such as /ˈθrɛp(ə)n-/ > /ˈθrʊp(ə)m-/ > /ˈθrʊm-/ (> /ˈθɹʌm-/).

Etymology from Wiktionary, CC BY-SA 4.0.