the.com/quick
Originally the opposite of dead, now the opposite of waiting.
means Happening or done in a short amount of time, with little delay.
from From Old English cwic, meaning alive — survives in phrases like the quick and the dead and the tender quick beneath your fingernail.
Old meaningOnce meant living, not fast.
QuicksilverMercury, named for seeming alive and squirming.
QuickenFirst felt fetal movement, the living stir.