slake

Concise Oxford English Dictionary © 2008 Oxford University Press:
slake/sleɪk/

▶verb

• 1 quench (one's thirst).

  ■ satisfy (a desire).

• 2 combine (quicklime) with water to produce calcium hydroxide.

– origin OE slacian ‘become less eager’, also ‘slacken’, from slæc (see slack1).