Having the quality of fascinating; capable of capturing and holding someone's intense interest.
From fascinate + -ive (suffix forming adjectives meaning 'tending to' or 'having the quality of'). This suffix dates back to Latin -ivus.
Words with the '-ive' suffix describe inherent qualities—so 'fascinative' means the quality is built into the thing itself, like how 'talkative' means someone naturally tends to talk, not just talked once.
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