circumstance (n.)youdaoicibaDictYouDict[circumstance 词源字典]
early 13c., "conditions surrounding and accompanying an event," from Old French circonstance "circumstance, situation," also literally, "outskirts" (13c., Modern French circonstance), from Latin circumstantia "surrounding condition," neuter plural of circumstans (genitive circumstantis), present participle of circumstare "stand around, surround, encompass, occupy, take possession of" from circum "around" (see circum-) + stare "to stand" from PIE root *sta- "to stand" (see stet). The Latin word is a loan-translation of Greek peristasis.

Meaning "a person's surroundings, environment" is from mid-14c. Meaning "a detail" is from c. 1300; sense of "that which is non-essential" is from 1590s. Obsolete sense of "formality about an important event" (late 14c.) lingers in Shakespeare's phrase pomp and circumstance ("Othello" III, iii).[circumstance etymology, circumstance origin, 英语词源]
run-up (n.)youdaoicibaDictYouDict
1834, "an act of running upward," from verbal phrase, from run (v.) + up (adv.). Extended sense "period of time or sequence of events proceeding some important event" is from 1966.
story (n.1)youdaoicibaDictYouDict
"connected account or narration of some happening," c. 1200, originally "narrative of important events or celebrated persons of the past," from Old French estorie, estoire "story, chronicle, history," from Late Latin storia, shortened from Latin historia "history, account, tale, story" (see history). Meaning "recital of true events" first recorded late 14c.; sense of "narrative of fictitious events meant to entertain" is from c. 1500. Not differentiated from history till 1500s. As a euphemism for "a lie" it dates from 1690s. Meaning "newspaper article" is from 1892. Story-line first attested 1941. That's another story "that requires different treatment" is attested from 1818. Story of my life "sad truth" first recorded 1938, from typical title of an autobiography.