bloodbath

From blood + bath, the latter used referring to a metaphorical deluge. Compare West Frisian bloedbad (“bloodbath”), Dutch bloedbad (“bloodbath”), German Blutbad (“bloodbath”), Danish blodbad (“bloodbath”), Norwegian Bokmål blodbad (“bloodbath”), Swedish blodbad (“bloodbath”), Icelandic blóðbad (“bloodbath”).

出典: Wiktionary「bloodbath」（CC BY-SA 4.0）