deriv LSK ETT STT aSTA ALPH OLDHOMEPAGE NEWHOMEPAGE
The root dviS द्विष् appears to take bent endings randomly.
dviS द्विष् + /laG /AtAm
→ **adviS- अद्विष् + /AtAm
→ !**adviSAtAm अद्विषाताम् "both hated"
But with a flat ending —
dviS द्विष् + /laG /tas
→ **adviS- अद्विष् + /tas
→ adviS- अद्विष् + /tAm''' by tasthasthamip...
→ adviS- अद्विष् + TAm टाम् by STunASTuH
→ !**adviSTAm अद्विष्टाम् "both hated"