Knob
来自Big Physics
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late Middle English: from Middle Low German knobbe ‘knot, knob, bud’.
wiktionary
From Middle English knobbe, from Middle Low German knobbe(“knob; knot in wood”). Cognate with Dutch knob, knobbel(“knob”), German Knubbe, Knubbel(“knob”). See also knop.
etymonline
knob (n.)
late 14c., knobe, probably from a Scandinavian or German source (compare Middle Low German knobbe "knob," Middle Dutch cnoppe, Dutch knop, Old Frisian knopp, knapp, Old High German knopf, German Knopf "button," Old Norse knyfill "short horn"). Meaning "knoll, isolated round hill" is first recorded 1640s, especially in U.S. For pronunciation, see kn-.
