Word Origin & History
must"male elephant frenzy," 1871, from Urdu mast "intoxicated, in rut," from Pers. mast, lit. "intoxicated," related to Skt. matta- "drunk, intoxicated," pp. of madati "boils, bubbles, gets drunk," from PIE base *mad- "wet, to drip."
EXPANDmusterc.1300, "to display, reveal, appear," from O.Fr. mostrer (modern Fr. montrer), from L. monstrare "to show," from monstrum "omen, sign" (see
monster). Noun meaning "act of gathering troops" is c.1400. To pass musters (1570s) originally meant "to undergo military review without
censure." To muster out "gather to be discharged from military service" is 1834, Amer.Eng. To muster up in the fig. and transf. sense of "gather, summon, marshal" is from 1620s. Related: Mustered; mustering.
COLLAPSE