transitory
TRAN-sih-tor-eeadjMeaning not permanent; lasting only for a time
Memory hook TRANSIT-ory: life at a bus stop. Nobody stays long at a bus stop: people wait a few minutes, then ride away in transit. A stay that short is transitory.
Her disappointment was transitory; by dinner she was laughing again.
In context The town’s gold-rush wealth proved transitory: within ten years the mines were empty and most of the grand hotels had closed.
Similar temporary, impermanent, short-lived, passing
Opposite permanent, lasting, enduring
From Latin transitorius, “passing,” from transire, “to go across.”