2 definitions found
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Toughen \Tough"en\, v. i. & t. [imp. & p. p. {Toughened}; p. pr
& vb n. {Toughening}.]
To grow or make tough, or tougher.
From WordNet r 1.6 [wn]:
toughen
v : make tough or tougher; "This experience will toughen her"
more about toughen
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