bloodless

Concise Oxford English Dictionary © 2008 Oxford University Press:
bloodless/ˈblʌdləs/

▶adjective

• 1 (of a conflict) without violence or killing.

• 2 (of the skin) drained of colour.

  ■ lacking in vitality; feeble.

• 3 (of a person) cold or ruthless.

– derivatives
bloodlessly adverb,
bloodlessness noun.