She toughened her resolve after the setback.

The coach tried to toughen the young players before the championship.

The materials engineers added tougheners to the polymer blend to prevent cracking under stress.

The manufacturer added a toughener to the polymer blend to improve its impact resistance.

The company is toughening its safety protocols after the incident.

Cold exposure toughens the skin over time.

The toughening of the polymer improved its resistance to abrasion and impact.

The new polymer is toughenable through controlled cross-linking, making it ideal for protective coatings.

The engineers implemented several toughenings on the bridge's support beams to prepare for heavier traffic.

After months of rough training, she toughened up and faced the challenge without fear.