It is known, from the existence in his time¹ of the Delphic tripod, that all these letters existed in 480 B.C. ; but on that monument the Khi and Psi differ from the forms used later.
Source: wiktionary
Khi
Synonyms for "khi" (2 found)
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3 total sentences available.
The letters upsilon, phi, khi, psi, δ were Greek additions
Source: wiktionary
Greek scripts display notable local characteristics — principally with regard to the shape of letters but also in the matter of the phonetic values attributed to signs such as san, sigma, khi, and psi.
Source: wiktionary
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.