pithy

Concise Oxford English Dictionary © 2008 Oxford University Press:
pithy/ˈpɪθi/

▶adjective (pithier, pithiest)

• 1 (of a fruit or plant) containing much pith.

• 2 (of language or style) terse and vigorously expressive.

– derivatives
pithily adverb,
pithiness noun.