He struggled to keep up the pace during the marathon.
relationships
Frequency:
50
%
It's important to keep up good relationships with your colleagues.
appearances
Frequency:
40
%
She tries to keep up appearances even when she's feeling down.
Idiomatic Expressions for keep up
Phrase: keep up appearances
Meaning: to maintain a certain image or facade, especially in public
Usage: Despite their financial troubles, they tried to keep up appearances by hosting lavish parties.