knock

knock verb uk/nɒk/ us knock verb
(HIT)

B1 to hit something or someone and make them move or fall down

сбивать, опрокидывать
He accidentally knock ed the vase off the table. I knock ed over the mug. He was knock ed unconscious by the blast. knock verb
(NOISE)

a sudden short noise made when something or someone hits a surface

стук
a knock at/on the door knock noun [C]