So tough a frame she could not bend.
Dryden.
5. Severe; violent; as, a tough storm. [Colloq.] " A tough debate. "
Fuller.
To make it tough, to make it a matter of difficulty; to make it a hard
matter. [Obs.] Chaucer.
Tough"-cake` (?), n. See Tough- pitch (b).
Tough"en (?), v. i. & t. [imp. & p. p. Toughened (?); p. pr. & vb. n.
Toughening.] To grow or make tough, or tougher.