- (5th BC Attic): IPA: /ekʰs/
- (1st BC Egyptian): IPA: /ɛkʰs/
- (4th AD Koine): IPA: /exs/
- (10th AD Byzantine): IPA: /eks/
- (15th AD Constantinopolitan): IPA: /eks/
ἐξ (+ genitive)
If the word precedes a word beginning with a consonant, it is ἐκ, if preceding a word beginning with a vowel, it is ἐξ.