Synonyms of 'knock someone up'
▷ See knock
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If something arouses you from sleep, it wakes you up.
We were aroused from our sleep by a knocking at the door.
When you awaken, or when something or someone awakens you, you wake up.
He was snoring when I awakened him.
When an egg from the ovary of a woman or female animal is fertilized, a sperm from the male joins with the egg, causing a baby or young animal to begin forming. A female plant is fertilized when its reproductive parts come into contact with pollen from the male plant.
sperm levels needed to fertilize the egg
Thesaurus for knock someone up from the Collins English Thesaurus