ἀρι
ὑπὸ δὲ τῆς φιλαυτίας παρηγμένοι ἄλογα φασὶν τὰ ζῷα ἐφεξῆς τὰ ἄλλα σύμπαντα → it is self-love which leads them to say that all the other animals without exception are non-rational
German (Pape)
[Seite 350] untrennbares Präfixum der Nomina, den Begriff des Wortes verstärkend, verwandt mit ἀρείων, ἄριστος, ἀρετή, Ἄρης, s. ἀρείων.
English (Autenrieth)
(root ἀρ): inseparable intensive prefix, very.
Greek Monotonic
ἀρῐ: [ᾰ], αχώριστο προθεματικό μόριο, όπως ἐρι-, επιτείνει τη σημασία που εκφράζεται από τη λέξη με την οποία συντίθεται· από την ίδια ρίζα με Ἄρης, ἀρετή.
Russian (Dvoretsky)
ἀρῐ: (ᾰ) неотделимая приставка со знач. очень, весьма (ср. ἀρίδακρυς, ἀρίδηλος).
Frisk Etymological English
Grammatical information: prefix
Meaning: inseparable prefix good, very (Il.)
Compounds: in ἀρί-γνωτος, -δείκετος, -πρεπής etc.
Origin: XX [etym. unknown]
Etymology: Generally connected with ἄριστος (q.v.), which cannot be verified. - Not to Skt. ari- in Ved. ari-gūrtá-, ari-ṣtutá-. Can hardly be separated from its synonym ἐρι-, but this seems impossible if it is IE: the ἐ- requires a *h₁, but this makes ἀ- impossible. Fur. 348 thinks the element is Pre-Greek because of the ἐ- / ἀ-. Szemerényi, too, (Gnomon 43, 1971, 667f.) thinks of an Anatolian element (Hitt.-Luv. ura-/uri- great). Willi HS 112, 1999, 86-100 convincingly disconnects the two and maintains the connection with ἄριστος; on ἐρι- s.v.
Middle Liddell
insep. Prefix, like ἐρι-, strengthening the notion conveyed by its compd.: of same Root with Ἄρης, ἀρετή.