slachd

thrash, beat, Irish slacairim; root slag, sleg, or sl$$.g, Early Irish sligim, beat, strike, slacc, sword: *slegô, beside Indo-European slak as in Gothic slaha, strike, German schlagen (do.), English slay (Stokes for sligim); further Latin lacerare, lacerate, Greek $$Glakízw, tear (Kluge). Hence slachdan, beetle, rod.