εἰ

See also: εἴ, εἶ, and εἷ

Ancient Greek

Probably from Proto-Indo-European *(h₁)ey, a locative form of *ís (“this”).^[1]^[2] See its sense, “that”, in ἐπεί (epeí) and compare the history of Latin sī.

εἰ • (ei)

^ Dunkel, George E. (2014), Lexikon der indogermanischen Partikeln und Pronominalstämme [Lexicon of Indo-European Particles and Pronominal Stems] (in German), volume 2: Lexikon, Heidelberg: Universitätsverlag Winter, →ISBN, page 186
^ Beekes, Robert S. P. (2010), “εἰ”, in Etymological Dictionary of Greek (Leiden Indo-European Etymological Dictionary Series; 10), with the assistance of Lucien van Beek, Leiden, Boston: Brill, →ISBN, page 379

“εἰ”, in Liddell & Scott (1940), A Greek–English Lexicon, Oxford: Clarendon Press
“εἰ”, in Liddell & Scott (1889), An Intermediate Greek–English Lexicon, New York: Harper & Brothers
“εἰ”, in Autenrieth, Georg (1891), A Homeric Dictionary for Schools and Colleges, New York: Harper and Brothers
εἰ in Bailly, Anatole (1935), Le Grand Bailly: Dictionnaire grec-français, Paris: Hachette
εἰ in Cunliffe, Richard J. (1924), A Lexicon of the Homeric Dialect: Expanded Edition, Norman: University of Oklahoma Press, published 1963
εἰ in the Diccionario Griego–Español en línea (2006–2025)
“εἰ”, in Slater, William J. (1969), Lexicon to Pindar, Berlin: Walter de Gruyter
G1509 in Strong, James (1979), Strong’s Exhaustive Concordance to the Bible
εἰ in Trapp, Erich, et al. (1994–2007), Lexikon zur byzantinischen Gräzität besonders des 9.-12. Jahrhunderts [the Lexicon of Byzantine Hellenism, Particularly the 9th–12th Centuries], Verlag der Österreichischen Akademie der Wissenschaften
Woodhouse, S. C. (1910), English–Greek Dictionary: A Vocabulary of the Attic Language‎^[1], London: Routledge & Kegan Paul Limited.
- assuming idem, page 47.
- grievance idem, page 373.
- if idem, page 414.
- intestate idem, page 453.
- open idem, page 574.
- spurn idem, page 806.
- supposing idem, page 841.
- whether idem, page 975.
- would that idem, page 991.