toughen up

I learnt pretty early on that I had to be resilient and toughen up a bit.

It also ruled that changes made to toughen up the regulations also breached competition law.

Last year a tribunal ruled low-interest shareholder loans should not be excluded from the scope of the APTs, and changes made to toughen up the regulations also breached competition law.

Would you say you use beautiful melodies to soften an acerbic lyric or use acerbic lyrics to toughen up a beautiful melody?

It said low-interest shareholder loans should not be excluded from the scope of the rules, and that changes made in February to toughen up the regulations also breached competition law.