The Collaborative International Dictionary
Forswonk
Forswonk \For*swonk"\, a. [Pref. for- + swonk, p. p. of swinkto
labor. See Swink.]
Overlabored; exhausted; worn out. [Obs.]
--Spenser.
Wiktionary
forswonk
a. (context obsolete English) exhausted; worn out