The Collaborative International Dictionary
Insinewing
Insinew \In*sin"ew\, v. t. [imp. & p. p. Insinewed; p. pr. & vb. n. Insinewing.] To strengthen, as with sinews; to invigorate. [Obs.]
All members of our cause, . . .
That are insinewed to this action.
--Shak.