to toughen
01
加强, 使坚韧
to make something stronger
例子
Regular exercise will toughen your muscles and improve your endurance.
定期锻炼会强化你的肌肉并提高你的耐力。
The coach implemented rigorous training drills to toughen the team before the championship.
教练实施了严格的训练演习，以在冠军赛前加强球队。
02
加强, 使更严格
to make something such as a rule or policy stronger
Transitive
词汇树
toughened
toughen
tough
