conk

noun

1
pass out from weakness, physical or emotional distress due to a loss of blood supply to the brain
2
pass from physical life and lose all bodily attributes and functions necessary to sustain life
She died from cancer
The children perished in the fire
3
hit, especially on the head
The stranger conked him and he fainted
4
come to a stop
The car stalled in the driveway

Also useful for “conk”:Scrabble— High-value letters — see what it scores