12 letters · 18 points in Scrabble
noun homicide without malice aforethought
originFrom Middle English manslaȝter, manslauter, equivalent to man + slaughter, or taken as an adaptation of Old English mansliht (“murder; killing of a person”), from mann (“person”) + sliht (“killing”), see manslaught. Cognate with Scots manslauchter (“homicide”). Compare also Old Frisian monslaga (“murder”).
Etymology from Wiktionary, CC BY-SA 3.0