wise up

phrasal verb·1 sense·particle up

Meanings

1

Realise something important and start behaving more sensibly about it

Why “up”? Rising into view. What comes up becomes present and visible.

He needs to wise up about his spending.
He needs to realise the truth and behave more sensibly about his spending.
She wised up after the scam.
She realised the truth and started behaving more sensibly after the scam.

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He needs to wise up about his spending. What does it mean?

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