Etymology
Advertisement
upheaval (n.)
1834 in reference to convulsions in society; 1836 in geology, from verb upheave (c. 1300, from up (adv.) + heave (v.)) + -al (2). Similarly formed verbs are Old Frisian upheva, Old High German ufhevan, German aufheben.
Related entries & more 
Advertisement
shake-out (n.)

also shakeout, "business or stock market upheaval," 1895, from verbal phrase; see shake (v.) + out (adv.). The verbal phrase is attested from c. 1200, earliest as "empty a container."

Related entries & more