Muster v. t. (past & past part. mustered; pres. part. mustering)
1.
To collect and display; to assemble, as troops for parade, inspection, exercise, or the like.
2.
Hence: To summon together; to enroll in service; to get together. "Mustering all its force.""All the gay feathers he could muster."
To muster troops into service (Mil.), to inspect and enter troops on the muster roll of the army.
To muster troops out of service (Mil.), to register them for final payment and discharge.
To muster up, to gather up; to succeed in obtaining; to obtain with some effort or difficulty. "One of those who can muster up sufficient sprightliness to engage in a game of forfeits."
... of the conventions I tried to feel apprehensive of grave peril. It was no use. I felt safe—not exactly comfortable, but perfectly safe. I could not even muster up a spasm of the spine when a member of our party leaned over and whispered in my ear that any one of these gentry roundabout us would cheerfully cut a man's throat for twenty-five cents. I was surprised, though, at the moderation of the cost; this was the only cheap thing I had struck in Paris. ... — Europe Revised • Irvin S. Cobb