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adj. 1. Characterized by violent emotions or actions; tumultuous: a tempestuous relationship. 2. Of, relating to, or resembling a tempest: tempestuous gales. [Middle English, from Late Latin tempestuōsus, from tempestūs, tempest, variant of tempestās; see TEMPEST.] tem·pestu·ous·ly adv. tem·pestu·ous·ness n. |
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