To make up for something is to compensate for something bad you did. Make up for the delay, nothing can make up for it.
It answers a fault with an action rather than an apology. It is also used of things rather than people, since a good summer can make up for a poor spring.
1phrasemake up forTo compensate for something bad you did.
“He worked the whole weekend to make up for missing Friday.”
make up for is a phrase.
Practised in Phrasal Verbs