Relating to or causing the complete removal or destruction of something.
Formed from extirpate with the adjectival suffix -ive, meaning 'tending to' or 'relating to' extirpation, following standard English adjective formation patterns.
Medical and scientific language uses adjectives like 'extirpative' to describe approaches that are aggressively complete—'extirpative surgery' means removing not just the problem but surrounding tissue too, which can be more effective but also more destructive.
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