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tr. & intr.v. tough·ened, tough·en·ing, tough·ens
To make or become tough. See Synonyms at harden.

tough′en·er n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.toughened - physically toughenedtoughened - physically toughened; "the tough bottoms of his feet"
rugged - sturdy and strong in constitution or construction; enduring; "with a house full of boys you have to have rugged furniture"
experienced, experient - having experience; having knowledge or skill from observation or participation
strong - having strength or power greater than average or expected; "a strong radio signal"; "strong medicine"; "a strong man"
2.toughened - made hard or flexible or resilient especially by heat treatmenttoughened - made hard or flexible or resilient especially by heat treatment; "a sword of tempered steel"; "tempered glass"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


[ˈtʌfnd] ADJ [material] → endurecido
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
References in classic literature ?
Some strength came to him finally from the mere struggle, undirected and misdirected as it often was, and such mental fibre as he had was toughened by the prolonged stress.
From the higher sides of the cog the bowmen could shoot straight down, at a range which was so short as to enable a cloth-yard shaft to pierce through mail-coats or to transfix a shield, though it were an inch thick of toughened wood.
At length, the toughened sinews of the white man prevailed over the less practiced limbs of the native.
These were all absolutely gas tight and filled with hydrogen, and the entire aerostat was kept at any level by means of a long internal balloonette of oiled and toughened silk canvas, into which air could be forced and from which it could be pumped.
"Now leave the Pawnee to be the pilot," said the trapper; "my hand is not so steady as it used to be; but he has limbs like toughened hickory.
It was Watson who took the telephone as Bell had made it, really a toy, with its diaphragm so delicate that a warm breath would put it out of order, and toughened it into a more rugged machine.
Police toughened persecution of Solton-Sary gold mine development prosters, MP Janar Akaev said in Parliament today.
The family-run business, which has been operating from purpose-built offices in Gateshead for more than 30 years and currently employs 55 staff, purchased a new glass-toughening machine capable of increasing production of toughened glass by around 40%.
Law bid Emma Harper wants law on sheep worrying to be toughened
Fishing trawlers active close to the Chinese coast also might need more attention, with checks at the harbors of Kinmen, Kaohsiung and Keelung to be toughened up, CNA reported.