¿Sabías que...?: El volcán más pequeño del mundo está en un país fronterizo con EEUU. ¿Qué país es?
toughen / endurecer
 
toughen   [ˈtʌfn]   also toughen up
A. -transitive verb
[+material]   endurecer
[+person]   fortalecer,   hacer masculineánoun fuerte   (figurative)
[+position]   endurecer
B. -intransitive verb   endurecerse
 
Collins Spanish Dictionary - Complete and Unabridged and Audio Headword Pronunciation (Spanish) 8th Edition 2005 © William Collins Sons & Co Ltd. 1971,1988 © HarperCollins Publishers 1992,1993,1996,1997,2000,2003,2005.
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