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English word

knock

B1Frequent NGSL-2
UK /nɒk/US /nɑːk/
noun

the sound of somebody hitting a door, window, etc. with their hand or with something hard to attract attention

verb

to hit a door, etc. in order to attract attention

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Sentence 78 · Pro
Joe Tsai Co-founder & Chair of Alibaba | In Good Company | Norges Bank Investment Management
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I didn't appreciate the scale until around 2005—when that was, you know, six or seven years into our founding—when Yahoo came knocking on the door and said, "We want to invest."

Joe Tsai Co-founder & Chair of Alibaba

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More real video examples

And there's some percussion, and that's me knocking the table like this.

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it was not the Knock of opportunity or the call of destiny—it was just another instance of

2019 Stanford Commencement address by Tim CookSentence 86 · Pro

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