名詞 knob:

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

1. Twist the knob to the right setting.
   把旋鈕擰到適當?shù)亩ㄎ粨跎稀?/div>
2. This knob is only held on by sellotape.
   這個旋鈕只是用透明膠帶固定住的。
3. As he turned the knob, the sound diminished.
   他一轉旋鈕，聲音就變小了。
4. A knob, knot, or other small protuberance.
   球形突出物，樹瘤球形突出物、節(jié)瘤或其它小的突出物
5. A knob, knot, protuberance, or swelling.
   節(jié)，結，瘤球狀物、結、節(jié)疤或腫瘤
6. `Does this knob come off?' `No, it's fixed on permanently.'
   ｀這個把手能拆下來嗎?＇｀不能，那是固定的.＇
7. You may turn the right knob on the TV to switch it on.
   你可以擰電視上右邊的旋鈕把它打開。

knob

n.（名詞）
A rounded protuberance.
圓塊，團：圓形突出物

A rounded handle, as on a drawer or door.
圓形把手，如抽屜或門上的
A rounded control switch or dial.
旋鈕：圓形的控制開關或圓盤
A prominent rounded hill or mountain.
圓形小丘，山：突出的圓形丘陵或山岳

來源：
Middle English knobbe
中古英語 knobbe

【引伸】
knobbed
knob.by
adj.（形容詞）