Etymology

opinative

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Today it means: Conjectural; expressing an opinion rather than a fact. Full definition →

Middle French opinatif ← Late Latin opinativus ← Latin opīnārī
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The story

  1. Latin · derived fromopīnārī
  2. Late Latin · derived fromopinativus
  3. Middle French · derived fromopinatif
  4. English todayopinative

From opine + -ate + -ive. Middle French opinatif, and its source, Late Latin opinativus, from the participle stem of Latin opīnārī.

Etymology from Wiktionary, CC BY-SA 4.0.