Inflammation

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late Middle English: from Latin inflammatio(n- ), from the verb inflammare (see inflame).

wiktionary

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From Middle French inflammation, from Latin īnflammātiō, īnflammātiōnem.

etymonline

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inflammation (n.)

early 15c., in pathology, "excessive redness or swelling in a body part," from Old French inflammation (14c.) and directly from Latin inflammationem (nominative inflammatio) "a kindling, a setting on fire," noun of action from past participle stem of inflammare "to set on fire" (see inflame). Literal sense "act of setting on fire" in English is from 1560s.