Where does “λυσσῶ” come from?

λυσσῶ (Ancient Greek) comes from Ancient Greek λύσσα, from Proto-Indo-European wĺ̥kʷos — wolf.

Ancestry of “λυσσῶ”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	λύσσα	rage, fury; mania, raging madness; rabies
2	Proto-Indo-European	wĺ̥kʷos	wolf

λυσσῶ — Etymology, Origin & Word History | Etymology Explorer