expand

Concise Oxford English Dictionary © 2008 Oxford University Press:
expand /ɪkˈspand, ɛk-/

▶verb

• 1 make or become larger or more extensive.

• 2 (expand on) give more details about.

• 3 become less reserved.

– derivatives
expandability noun,
expandable adjective,
expander noun,
expansibility noun,
expansible adjective.

– origin ME: from L. expans-, expandere ‘to spread out’.