somehow from or on analogy of Du. aanslag
"attack," from M.Du. aenslach,
"on" + slach
"blow," related to slaen
"slay." Spelling infl. by obs. (since c.1400) Eng. slaught
(n.) "slaughter," from O.E. sleaht
). No record of its use in 18c.; apparently revived by Scott.