knock1
/nɒk नॉक्/ verb 1 [I] knock (at/on something) to make a noise by hitting something firmly with your hand हाथ से किसी वस्तु पर ज़ोर के प्रहार द्वारा अवाज़ कराना; (दरवाज़े आदि) को खटखटाना
Someone is knocking at the door.
IDM
knock about/around ( informal ) to travel and live in various places जगह-जगह की यात्रा करना और वहाँ रहना
Is last week’s newspaper still knocking about?
knock somebody down to hit somebody causing him/her to fall to the ground किसी को (धक्का या घूँसा) मारकर नीचे गिरा देना
The old lady was knocked down by a cyclist.
knock something down to destroy a building, etc. किसी इमारत आदि को नष्ट कर देना
They knocked down the old factory because it was unsafe.
knock something off
knock somebody out