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| tough·en [ túffən ] (past and past participle tough·ened, present participle tough·en·ing, 3rd person present singular tough·ens) |
transitive and intransitive verb |
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1. make or become more severe: to become stricter or more severe, or make somebody or something so
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2. make or become stronger: to become more resolute, hardier, or physically or emotionally stronger, or make somebody so
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3. make or become tougher: to become less easy to cut or chew or less liable to wear or damage, or make something so
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 tough·en·er noun |
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