Ge-wærlǽcan

According to the Old English Dictionary:

ge-wærlǽcan

Substitute: To warn :-- Cain wiste his fæder forgǽgednysse, and næs þurh ꝥ gewærlǽht, ac þár tó eácan his ágenne bróðor ácwealde Cain sciebat damnationem praevaricationis primae, et non timuit originali peccato fratricidii superaddere scelus, Angl. vii. 32, 303. ge-wærlæcan