The Homeric Greek word ἐπήν
Word ἐπήν
ě p ɛː. n
IPA epε:n
Meaning when, after
See also Lycian: epñ ‘afterwards’
Synonyms ἐπεί, κατόπισθεν, ὁπότε

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Iliad

Other words that might be of interest
ἅμα ‘at once, at the same time’, ἁμαρτῆ ‘together, at same time, at once’, ἄλλοτε ‘at another time’, ἄμυδις ‘together, at the same time’, ἀεί ‘ever, always’, ἀειγενέτης ‘everlasting’, αὐτίκα ‘forthwith, at once, in a moment’, δείλη ‘afternoon’, ἑπτάς ‘period of seven days’, ἔτι ‘yet, still’, ἐξαῦτις ‘once more, anew’, ἐπειδάν ‘whenever’, εἶθαρ ‘at once, forthwith’, ἦνις ‘a year old, yearling’, μεθό ‘after that’, μετέπειτα ‘afterwards, thereafter’, ὀψέ ‘after a long time, at length, late’, πώποτε ‘ever yet’, πω ‘up to this time, yet’, τεσσαρακοντάς ‘period of forty days’, χρόνος ‘time’, ἅπαξ ‘once, once only, once for all’, ἐπετήσιος ‘from year to year, yearly’, καθάπαξ ‘once for all’, λυκάβας ‘year’, μήποτε ‘never, on no account’