A transitive verb is a verb that requires a direct object (e.g. I bought a book.).
transitive verb
1. (general)
a. endurecer
toughened glassvidrio reforzado
toughen [ˈtʌfn]
toughen up
transitive verb
[+material] endurecer; [+person] fortalecer; hacer más fuerte; [+position] endurecer
they have toughened their position on the surrendering of arms
intransitive verb
Collins Complete Spanish Electronic Dictionary © HarperCollins Publishers 2011
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