Proto-IE: *ares- <PIH *a->
Meaning: to be angry, to lose one's temper
Hittite: arsanai-/-ija- (II) 'beneiden, sich ärgern' (Tischler 67-68) (but cf. also harsallant- 'zornig', Tischler 182-184 without etymology)
Tokharian: A rse, B rser, räser 'Haß' (Adams 542)
Old Indian: irasyáti `to show enmity, be angry or envious', irasyā́ f. `enmity, malevolence'; īrṣyā́ f. `envy, spite, malice'
Avestan: araska- `Neid'; ǝrǝsi- `Neid'
Other Iranian: MPers, Npers arašk `Neid, Eifer'
Armenian: erram `siede, walle; bin in unruhiger Bewegung; wimmle, kribble; entzünde mich; bin leidenschaftlich erregt; bin oder werde eifrig, zornig'; herr `Zorn, Neid, Hader'
Old Greek: arǟ́ f. `Schaden, Unheil, Verderben', ap-arés = hügiés Hsch., áros = akoúsion blábos (Hsch.), arei̯ǟ́ f. `Verwünschung, Drohung' (Hom.), epḗrei̯a `übermütige Beandlung, Kränkung, Drohung', ep-ēreázdō 'to threaten abusively, to deal despitifully with, etc.'
Latin: errāre `(umher)irren, sich verirren'
Russ. meaning: гневаться, терять соображение
References: WP I 149 f
