adumbrate

Concise Oxford English Dictionary © 2008 Oxford University Press:
adumbrate /ˈadʌmbreɪt/

▶verb formal

• 1 give a faint or general idea of.

  ■ foreshadow.

• 2 overshadow.

– derivatives
adumbration noun,
adumbrative adjective.

– origin C16: from L. adumbrat-, adumbrare, from ad- ‘to’ (as an intensifier) + umbrare ‘cast a shadow’.