for·sake 
(fôr-sāk, fər-)
(fôr-sāk, fər-)tr.v. for·sook (-sk), for·sak·en (-sākən), for·sak·ing, for·sakes
1. To give up (something formerly held dear); renounce: forsook liquor.
2. To leave altogether; abandon: forsook Hollywood and returned to the legitimate stage.
[Middle English forsaken, from Old English forsacan; see sāg- in the Appendix of Indo-European roots.]