knob

Từ điển Oxford Advanced Learner 8th

knob [knob knobs knobbed knobbing] BrE [nɒb] NAmE [nɑːb] noun
1. a round switch on a machine such as a television that you use to turn it on and off, etc
•the volume control knob
2. a round handle on a door or a drawer
3. a round lump on the surface or end of sth
4. (especially BrE)a small lump of sth such as butter
5. (BrE, taboo, slang)a ↑penis
Idiom: ↑with knobs on

Word Origin:
late Middle English: from Middle Low German knobbe ‘knot, knob, bud’.

Example Bank:
•I tried the knob, and this time the door opened.
•I've tried fiddling with the knobs, but nothing seems to happen.
•the knobs on the radio
•She turned the heavy brass door knob.

• Từ đồng nghĩa / Synonyms:
  pommel, node, thickening, boss