sometime (at some unknown or unspecified point in time) · sometime, someday, one day
eş: pewnego razu, reg. śl. kesik, kiejś, kedyś
köken: Etymology tree Proto-Slavic *kъgъdy Old Polish kiegdy Polish kiedy Proto-Indo-European *ḱe Proto-Indo-European *ís Proto-Indo-European *ḱís Proto-Balto-Slavic *śís Proto-Slavic *sьder. Old Polish -ś Polish -ś Polish kiedyś From kiedy + -ś. First attested in 1560. Compare Kashubian czedës, and Silesian kedyś.
Kiedyś mogłem przejść dziesięć mil dziennie, ale teraz już nie.
one day, someday, some day (at an unspecified time in the future) · one of these days (at an unspecified time in the future, especially in warning of a negative consequence)
köken: Essive singular form of jokin päivä (“some day”).
sometime, ever (indeterminate correlative of time) · once
köken: From i- (indeterminate correlative prefix) + -am (correlative suffix of time). Originally ian in the earliest Esperanto texts; see -an for more.
köken: Literally, “a day among the others”. Compare the similar construct in Arabic يَوْمًا مِنَ ٱلْأَيَّامِ (yawman mina l-ʔayyāmi, literally “a day of the days”).