Serving to explain or make something clearer; designed to help people understand.
From 'elucidate' plus the Latin suffix '-ive' (meaning 'tending to' or 'relating to'). This suffix transforms verbs into adjectives describing what something does or its quality.
The suffix '-ive' is a master builder in English — it transforms action words into descriptive words (create → creative, inform → informative, elucidate → elucidative), letting us describe the nature or tendency of things.
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