ἴσος

• ἶσος (îsos) — Epic, Ionic
• εἴσος (eísos), εἶσος (eîsos), ἔῑ̈σος (éī̈sos), ἐῗσος (eï̂sos) — Epic, epenthetic
• ῐ̔́σος (hĭ́sos) — Koine
• ϝίσϝος (wíswos) — Cretan, Arcadocypriot

From ἶσος (îsos), itself from earlier *ϝῖσϝος (*wîswos), of disputed origin:^[1]

• The Cretan and Arcadocypriot forms suggest Proto-Hellenic *wíswos, perhaps from a Proto-Indo-European *wi- (“to separate”). In this case, compare Vedic Sanskrit विश्व (víśva, “all, every; whole, entire, universal”), Proto-Slavic *vьśь (“all; village”) and English with. Beekes rejects this derivation, as the Indo-European affix *-su- was apparently not retained in Greek.
• From an earlier *witˢwos, apparently from a zero-grade formation *wid-s- related to εἶδος (eîdos, “form, shape”), from Proto-Indo-European *weyd- (“to see, know”).
• According to Meillet, from δύω (dúō, “two”) + a thematization of a suffix -τυ- (-tu-). This is semantically appealing and phonetically sound, but noticeably contrived.

ῐ̓́σος • (ĭ́sos) m (feminine ῐ̓́ση, neuter ῐ̓́σον); first/second declension

1. (of size, strength, or number) equal (to), equivalent (to), consistent (to), agreement (to) [with dative ‘something, someone’]
   1. the same as [with dative ‘something, someone’]

      Synonyms: αὐτός (autós), ὁμός (homós)

   2. (of appearance) like [with dative ‘something, someone’]
   3. (with implied reference point) like, similar
   4. (with pronoun) like his; like hers etc. (like the one that person has)
   5. repeated to denote relationship between equal persons or things

      ἴσα πρὸς ἴσα ― ísa pròs ísa ― tit for tat

2. (not comparable, mathematics) equal to [with dative ‘a number’]; (in the plural) equal (to each other)
3. (not comparable, geometry, of lines) of equal length; (of shapes) congruent; of equal area
4. just, fair
   1. (comparable, politics) equal in rights, based on equality of rights
   2. (of persons) impartial
5. (rare) adequate
6. (of land) even, level, flat

• Greek: ίσος (ísos)

ῐ̓́σος • (ĭ́sos) m or f (genitive ῐ̓́σου); second declension

1. (chiefly in the plural) an equal (person of equal status)

• “ἴσος”, in Liddell & Scott (1940), A Greek–English Lexicon, Oxford: Clarendon Press
• “ἴσος”, in Liddell & Scott (1889), An Intermediate Greek–English Lexicon, New York: Harper & Brothers
• ἴσος in Bailly, Anatole (1935), Le Grand Bailly: Dictionnaire grec-français, Paris: Hachette
• Bauer, Walter et al. (2001), A Greek–English Lexicon of the New Testament and Other Early Christian Literature, Third edition, Chicago: University of Chicago Press
• “ἴσος”, in Slater, William J. (1969), Lexicon to Pindar, Berlin: Walter de Gruyter
• G2470 in Strong, James (1979), Strong’s Exhaustive Concordance to the Bible
• Woodhouse, S. C. (1910), English–Greek Dictionary: A Vocabulary of the Attic Language‎^[1], London: Routledge & Kegan Paul Limited.
  • analogous idem, page 28.
  • commensurate idem, page 147.
  • corresponding idem, page 176.
  • disinterested idem, page 234.
  • equal idem, page 280.
  • equitable idem, page 280.
  • equivalent to idem, page 281.
  • even idem, page 284.
  • fair idem, page 302.
  • honest idem, page 404.
  • impartial idem, page 419.
  • just idem, page 466.
  • level idem, page 486.
  • like idem, page 491.
  • parallel idem, page 591.
  • right idem, page 714.
  • similar idem, page 776.
  • unbiassed idem, page 908.
  • unprejudiced idem, page 927.
  • upright idem, page 938.