n.（号起混乱的）巨变,
Merriam-Webster Online Dictionary
upheaval (noun)1.
the action or an instance of especially of part of the earth's crust - upheaving
2.
extreme agitation or disorder radical change , also an instance of this
Merriam-Webster Online Thesaurus
upheaval (noun)a violent disturbance (as of the political or social order)
SYNONYMS:
bouleversement, cataclysm, earthquake, paroxysm, storm, tempest, tumult, upheaval, uproarRELATED WORDS:
insurgency, insurrection, mutiny, overthrow, overturn, rebellion, revolt, revolution, subversion, unrest, uprising, upset; fit, seizure, spasm; eruption, flare-up, outbreak, outburst; bluster, bobbery, bustle, coil, commotion, furor, furore, fuss, hubbub, hullabaloo, hurly-burly, pandemonium, rout, row, ruckus, ruction, rumpus, shindy, squall, stew, stir, to-do, turmoil, welter, williwaw; quaking, rocking, shaking, trembling