smart ‧ en /ˈsmɑːtn $ ˈsmɑːr-/ BrE AmE verb
smarten something ↔ up phrasal verb especially British English
1 . smarten yourself up to make yourself look neat and tidy:
You’d better smarten yourself up.
2 . to make something look neater:
We need to smarten the place up a bit.
3 . smarten up your act/ideas to improve the way you behave or do something:
The company needs to smarten up their act if they are to keep customers.