Meaning

adjective destitute of blood or apparently so; - John Dryden

adjective free from blood or bloodshed

adjective without vigor or zest or energy

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

Etymology from Wiktionary, CC BY-SA 3.0