knob

名词 knob:

1. a circular rounded projection or protuberance
   同义词：boss
2. a round handle
3. any thickened enlargement
   同义词：node, thickening
4. an ornament in the shape of a ball on the hilt of a sword or dagger
   同义词：pommel

1. Twist the knob to the right setting.
   把旋钮拧到适当的定位挡上。
2. This knob is only held on by sellotape.
   这个旋钮只是用透明胶带固定住的。
3. As he turned the knob, the sound diminished.
   他一转旋钮，声音就变小了。
4. A knob, knot, or other small protuberance.
   球形突出物，树瘤球形突出物、节瘤或其它小的突出物
5. A knob, knot, protuberance, or swelling.
   节，结，瘤球状物、结、节疤或肿瘤
6. `Does this knob come off?' `No, it's fixed on permanently.'
   ｀这个把手能拆下来吗?＇｀不能，那是固定的.＇
7. You may turn the right knob on the TV to switch it on.
   你可以拧电视上右边的旋钮把它打开。

knob

n.（名词）
A rounded protuberance.
圆块，团：圆形突出物

A rounded handle, as on a drawer or door.
圆形把手，如抽屉或门上的
A rounded control switch or dial.
旋钮：圆形的控制开关或圆盘
A prominent rounded hill or mountain.
圆形小丘，山：突出的圆形丘陵或山岳

来源：
Middle English knobbe
中古英语 knobbe

【引伸】
knobbed
knob.by
adj.（形容词）