v. Obs. rare1. [properly byswinke, f. BY- = BE- intensive + SWINK v. to labor, toil.] intr. To work hard, exert oneself, labor.

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a. 1400[?].  Morte Arth., 1128. Fulle swythe he byswenkez, Swappez in with the swerde þat it þe swange brystedd.

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