Upset
wiktionary
From Middle English upset(“the act of setting up; establishment”), from Middle English upsetten, corresponding to up- + set. Cognate with Middle Low German upset(“setup; arrangement”).
etymonline
upset (v.)
mid-15c., "to set up, fix," from up (adv.) + set (v.). Similar formation in Middle Dutch opsetten "set up, propose," German aufsetzen. Modern sense of "overturn, capsize" (1803) is that of obsolete overset. In reference to the stomach, from 1834. Meaning "to throw into mental discomposure" is from 1805. Related: Upsetting.
upset (n.)
early 15c., "insurrection," from upset (v.). Meaning "overturning of a vehicle or boat" is recorded from 1804.
upset (adj.)
early 14c., "erected," past-participle adjective from upset (v.). From 1805 as "distressed."
