The Collaborative International Dictionary of English v.0.48:
Forethink \Fore*think"\, v. t. 1. To think beforehand; to anticipate in the mind; to prognosticate. [Obs.] [1913 Webster] The soul of every man Prophetically doth forethink thy fall. --Shak. [1913 Webster] 2. To contrive (something) beforehend. [Obs.] --Bp. Hall. [1913 Webster]The Collaborative International Dictionary of English v.0.48:
Forethink \Fore*think"\, v. i. To contrive beforehand. [Obs.] [1913 Webster]