Relating to or characterized by adequation; tending to make adequate or equal.
Formed from 'adequation' plus the suffix '-ive,' which creates adjectives meaning 'tending to' or 'relating to.' The suffix '-ive' comes from Latin and has been used in English since medieval times.
In grammar and logic, the 'adequative' case (found in some languages like Finnish) marks relationships of correspondence or equation, showing how a single Latin root spawned specialized technical vocabulary.
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