Cadaver

google

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late Middle English: from Latin, from cadere ‘to fall’.

wiktionary

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Recorded since c.1500, borrowed from Latin cadāver.

etymonline

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cadaver (n.)

"a dead body, a corpse," late 14c., from Latin cadaver "dead body (of men or animals)," probably from a perfective participle of cadere "to fall, sink, settle down, decline, perish," from PIE root *kad- "to fall." Compare Greek ptoma "dead body," literally "a fall" (see ptomaine); poetic English the fallen "those who have died in battle."