0 past simple and past participle of toughen --
1 to make something or someone tough, strong, or stronger: --
2 to become difficult to deal with: --
Amid toughening competition in the market, many firms are going out of business.
That is without any compulsion from the police at all—merely a requirement that laminated glass should be fitted instead of toughened glass.
More and more countries are turning towards laminated as opposed to toughened glass.
I believe that until the relative benefits of zone toughened and laminated windscreens are more clearly established motorists should remain free to choose either type.
I have insufficient evidence to justify making either toughened or laminated safety glass compulsory to the exclusion of the other.
We believe that one response to that is the adoption of toughened drinking glasses in pubs and clubs.
A number of complaints have been received about cups and other articles made from toughened glassware which have disintegrated spontaneously.
The latest type of toughened glass does not completely obscure the driver's view of the road ahead when shattered.
It should no longer tolerate excuses for evasion of its sanctions and those sanctions must be toughened and extended.
