φιν

English (LSJ)

= σφιν,

   A v. σφεῖς A.11.

   A v. -φι.

Greek (Liddell-Scott)

φιν: ἀντὶ σφιν, ἴδε ἐν λέξ. σφεῖς.

English (Autenrieth)

a vestige of several old caseendings, appended to the stem-vowel of the various declensions, (1st decl.) -ηφι, -ῆφι (but ἐσχαρόφι), (2d decl.) -όφι, (3d decl.) -έσφι (but ναῦφι); of persons only in two words, θεόφι, αὐτόφι. The form produced by the suffix may stand for a gen. (ablative), or a dative (instrumental, locative), with or without prepositions.
see φι.