knock

• vi. 敲；打；敲击
• vt. 敲；打；敲击；批评
• n. 敲；敲打；爆震声

拟声词，敲打东西的声音。比较click,clock.

knock

knock: [OE] knock is a classic onomatopoeic word: that is to say, it originated in a direct imitation of the sound it denotes. The similar Swedish knacka ‘knock’ may be related. The figurative use of the word for ‘criticize’ originated in late 19th-century America.

knock (v.)

Old English cnocian (West Saxon cnucian), "to pound, beat; knock (on a door)," likely of imitative origin. Meaning "deprecate, put down" is from 1892. Related: Knocked; knocking. Knock-kneed first attested 1774. Knock-down, drag-out is from 1827. Command knock it off "stop it" is first recorded 1880, perhaps from auctioneer's term for "dispose of quickly:"

At the commencement of the sales, he gave every one that wanted to purchase a paper containing a description of the lands that were to be sold; and, as the sales were cried, he called over the numbers and described the land; and when it got up to one dollar and a quarter an acre, if no body bid, after it was cried two or three times, he would say, knock it off, knock it off. [U.S. Senate record, 1834]

knock (n.)

mid-14c., from knock (v.). As an engine noise, from 1899.

来自柯林斯例句

2. They decided to knock the two rooms into one.

他们决定把两间屋子打通连成一间。

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3. What they said was a real knock to my self-confidence.

他们的话是对我自信心的一次重大打击。

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4. He had many motives for wanting to knock off Yvonne.

他有很多杀伊冯娜的动机。

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5. When we stop enjoying ourselves we'll knock it on the head.

等玩够了，我们就会结束。

来自柯林斯例句