Chaucer, Prologue, l. 523.
Swink (Sc. n.Cy. Yks. War. Hrf. Ken.), to work hard, labour, toil, O.E. swincan, M.E. swinken:
Or swynke with his handes, and laboure.
Prologue, l. 186.
The form swinked, oppressed, tired, also occurs, reminding us of Milton’s:
... what time the labour’d ox
In his loose traces from the furrow came,
And the swink’t hedger at his supper sate.
Comus, ll. 291-3.