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keep up
muster

keep up

 
part of speech: phrase
definition 1: to go at the same speed or pace as someone or something else (often fol. by "with").
The little boy can't keep up with his older brothers.You're going too fast for me! I can't keep up!
definition 2: to continue with (some activity).
I started playing the clarinet when I was ten, and I kept it up until I was fourteen.
definition 3: to maintain (something) at a high or desired level.
They've kept up their friendship for many years now.You're doing a great job. Keep it up!
definition 4: to stop (someone) from going to bed or to sleep.
Don't keep your brother up too late with your game. He needs his sleep.That dog's barking kept me up till two in the morning.