Definition of Toughen. Meaning of Toughen. Synonyms of Toughen
Here you will find one or more explanations in English for the word Toughen.
Also in the bottom left of the page several parts of wikipedia pages related to the word Toughen and, of course, Toughen synonyms and on the right images related to the word Toughen.
Definition of Toughen
Toughen Toughen Tough"en, v. i. & t. [imp. & p. p. Toughened; p. pr.
& vb. n. Toughening.]
To grow or make tough, or tougher.