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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 ?
At length, the toughened sinews of the white man prevailed over the less practiced limbs of the native.
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.
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.
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.
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.
The Chief Mechanical Engineering Department (Cme) Of IarnrEd Eeireann Has A Four (4) Year Requirement For The Replacement Of External And Internal Glass Panels And Are Seeking Expressions Of Interest From Suitably Experienced And Qualified Companies Who Can Supply Toughened, Laminated And Toughened Laminated Glass Manufactured To Ie Drawings And Railway Passenger Vehicle Standards.
The Criminal Chamber toughened the sentences, Tuesday, by handing down prison terms of two to four years.
I do not think regulations with regard to NGOs should be toughened.
By contrast, a cold frame tends to be more permanent - a base of bricks or railway sleepers to the height of about 20in and covered by toughened glass, often at a slight angle to stop the rain collecting on top.
Its toughened glass was used for a variety of uses, from floodlight covers to decorative furniture glass.
This report analyzes the Global market for Toughened Display Cover Glass in US$ Million.