"musters" in the noun sense
a gathering of military personnel for duty
"he was thrown in the brig for missing muster"
2. conscription, muster, draft, selective service
compulsory military service
"musters" 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"
call to duty, military service, jury duty, etc.
Source: WordNet® (An amazing lexical database of English)
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