HARDSTRONG PERSONto become tougher, or to make someone or something tougher (使)变坚韧;(使)变坚强
toughened glass
强化玻璃
Three years in the army toughened him up.
在部队的三年使他更加坚强了。
Examples from the Corpus
toughen• The schools claimed to toughenboys, and they did.• The state is toughening its anti-smoking laws.• GovernorBush has made his mark building prisons, toughening laws on juvenilecrime and calling for lowerproperty taxes.• Even better would be cakeflour, which contains even less of those tougheningproteins, she said.• Just the opposite is true with cake, muffin or quick-bread recipes where too much gluten will toughen the finishedproduct.• Both conservatives and Communists have simply toughened their attitude to the government.• Thus, cottonconsists of cellulose; and so does wood, though wood is toughened with lignin.