From Middle English forethynken, from Old English foreþenċan (“to premeditate, consider, be mindful”), corresponding to fore- + think. Cognate with Dutch voordenken, German vordenken (“to think ahead”).
forethink (third-person singular simple present forethinks, present participle forethinking, simple past and past participle forethought)
- (transitive, rare) To plan (something) in advance; think, consider, or contrive beforehand; prognosticate.
- (intransitive, rare) To think about beforehand; to anticipate.
- 1635, John Donne, Song:
- Let not thy divining heart / Forethinke me any ill [...].