"mustering" in the verb sense
1. muster, rally, summon, come up, muster up
gather or bring together
"muster the courage to do something"
"she rallied her intellect"
"Summon all your courage"
2. muster
call to duty, military service, jury duty, etc.
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License