Words similar to toughened

Example sentences for: toughened

How can you use “toughened” in a sentence? Here are some example sentences to help you improve your vocabulary:

You see this logic at work in environmental issues (the Rio accords, now being toughened), economic issues (the World Trade Organization, growing in importance), and other areas.
Since then, however, public opinion has gradually toughened.
Cocaine use is illegal, but as governor of Texas, he's toughened penalties for people convicted of selling or possessing less than a gram of coke (a crime previously punished by probation).
Most states have already toughened their welfare programs under waivers granted under the old pre-reform rules.