becastEtymologyFrom Middle English bicasten, equivalent to be- + cast. Sense of plan, plot due to conflation with costen (“to contrive, try”). More at costen.becast means To cover or surround by casting (something) about. Lexicurio rates it Rare gem — a strength score of 74 out of 100.verbTo cover or surround by casting (something) about.To cast about; plan; plot; contrive.