Toŭgh'en1, v. i.
(tŭf'n), v. i. [imp. & p. p. TOUGHENED; p. pr. & vb. n. TOUGHENING.] To grow tough, or tougher.
2 entries under this word
Toughen
Tough'en2, v. t.
(tŭf'n), v. t. To make tough, or tougher.
2 entries under this word
(tŭf'n), v. i. [imp. & p. p. TOUGHENED; p. pr. & vb. n. TOUGHENING.] To grow tough, or tougher.
(tŭf'n), v. t. To make tough, or tougher.