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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.
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"


[ˈtʌfnd] ADJ [material] → endurecido
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.
Tenders are invited for Provision of Toughened glass and sanitary fitting for toilet of building No HT-2 at Gandhinagar
This method also includes use of the grafted triglycerides to make toughened resin and composite systems with reduced hazardous air pollutants without reducing the glass transition temperature or increasing the viscosity.
Animal cruelty sentencing guidelines need to be amended and toughened so that anyone who tortures an animal to death for pleasure does so in the full knowledge that they'll be heading to jail if caught.
India, July 21 -- Corning has unveiled the next iteration of Gorilla Glass, a toughened glass used on most touchscreen devices.
A classy round timepiece designed in brass case with genuine calf leather strap and toughened mineral glass, one model (right photos) has a water resistance of 5 ATM.
The Criminal Chamber toughened the sentences, Tuesday, by handing down prison terms of two to four years.