say it: too-MUHL-choo-uhs
tumultuous is an adjective meaning "characterized by unrest or disorder or insubordination". It carries one recorded sense.
characterized by unrest or disorder or insubordination
“effects of the struggle will be violent and disruptive”
“riotous times”
“these troubled areas”
“the tumultuous years of his administration”
“a turbulent and unruly childhood”
Definitions, synonyms and semantic relations for tumultuous come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.