evacuate

Concise Oxford English Dictionary © 2008 Oxford University Press:
evacuate /ɪˈvakjʊeɪt/

▶verb

• 1 remove from a place of danger to a safer place.

  ■ leave (a dangerous place).

  ■ (of troops) withdraw from (a place).

• 2 technical remove air, water, or other contents from (a container).

  ■ empty (the bowels or another bodily organ).

– derivatives
evacuation noun.

– origin ME: from L. evacuat-, evacuare, from e- (var. of ex-) ‘out of’ + vacuus ‘empty’.