extinguish

Concise Oxford English Dictionary © 2008 Oxford University Press:
extinguish/ɪkˈstɪŋɡwɪʃ/

▶verb

• 1 put out (a fire or light).

• 2 put an end to.

• 3 cancel (a debt) by full payment.

  ■ Law render (a right or obligation) void.

– derivatives
extinguishable adjective,
extinguisher noun,
extinguishment noun (Law).

– origin C16: from L. exstinguere, from ex- ‘out’ + stinguere ‘quench’.