I.toughen up GLAG. [am. angl. ˈtəfən -, brit. angl. ˈtʌfn -] (v + adv + o, v + o + adv)
1. toughen up (strengthen):
2. toughen up person:
- toughen up (make physically resilient)
- toughen up (make emotionally resilient)
- toughen up (make emotionally resilient)