hart arbeiten, um

work hard to

→ hart
phrase Rare #44,689
work hard to Describes working hard in order to achieve or avoid something; um is followed by an infinitive phrase.
GE: Ich muss hart arbeiten, um den Test zu bestehen.
EN: I have to work hard to pass the test.

Tja, dafür muss man hart arbeiten, um das zu schaffen.

Well, you have to work hard to achieve that.

— Memories of Murder (2003)

Ich muss hart arbeiten, um den Test zu bestehen.

I have to work hard to pass the test.

Man muss hart arbeiten, um nicht so zu werden, wie er.

You have to work hard to avoid becoming like him.

— Battle Royale (2000)