Unspan

v. rare. (UN-² 3 + SPAN v.² Cf. OE. un-, onspannan, Du. ontspannen.)

1648.  Hexham, II. Ontspannen,… to Vnspan, or to Vnyoake. Ibid., Een Ontspanninge,… an Vnbending, or an Vnspanning.

1659.  W. Chamberlayne, Pharon., III. v. 92. The grave sad man, Whose counsel could conspiracies unspan When ready to give fire.