1. Characterized by unrest or disorder or insubordination
   "the tumultuous years of his administration"
   - disruptive, riotous, troubled, turbulent

See also: tumult, unquiet

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• simple microscope
• simple mindedness
• simple pendulum
• simple phobia
• simple pistil
• simple protein
• simple regression
• simple sentence
• simple sugar
• simple-hearted
• simple-minded
• simpleness
• simpleton
• simplex
• simplicity
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• simply
• Simpson