Characterized by sudden, violent, or forceful bursting forth; prone to erupting or breaking out suddenly.
From Latin eruptivus, derived from eruptus (past participle of erumpere, meaning 'to burst forth'). The prefix e- means 'out' and rumpere means 'to break.' The term originally referred to volcanic activity but expanded to describe any sudden explosive action.
Volcanologists use 'eruptive' to classify not just lava flows but also the style of an eruption—some are gentle, others are catastrophically explosive. This word helps scientists predict danger by describing volcanic personality types.
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