condense

Concise Oxford English Dictionary © 2008 Oxford University Press:
condense/kənˈdens/

▶verb

• 1 change from a gas or vapour to a liquid.

• 2 (usu. as adj. condensed) thicken (a liquid) by heating it to reduce the water content.

• 3 make denser or more concentrated.

  ■ express (a piece of writing or speech) in fewer words; make concise.

– derivatives
condensable adjective.

– origin ME: from OFr. condenser or L. condensare, from condensus ‘very thick’.