tough·en /ˈtʌfən/ verb tough·ens; tough·ened; tough·en·ing
to make (something) stricter or to become stricter [+ obj
] ▪ The government is toughening antidrug laws.
— often + up ▪ The antidrug laws have been toughened up recently.
] — usually + up ▪ The antidrug laws have toughened up recently.
to make (someone) physically or emotionally stronger or to become physically or emotionally stronger [+ obj
] ▪ The experience toughened him.
— often + up ▪ The experience toughened him up.
] — usually + up ▪ You need to toughen up if you want to succeed in this business.