Bloodless

wiktionary

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From Middle English blodles, from Old English blōdlēas(“bloodless”), equivalent to blood +‎ -less. Cognate with Dutch bloedeloos(“bloodless”), German blutlos(“bloodless”), Danish blodløs(“bloodless”), Swedish blodlös(“bloodless”), Icelandic blóðlaus(“bloodless”).

etymonline

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bloodless (adj.)

Old English blodleas, "drained of blood;" see blood (n.) + -less. The figurative sense in Middle English was "powerless, without spirit or energy." Meaning "free from bloodshed" is from c. 1600; that of "cold-hearted" is from 1881. Related: Bloodlessly.