köken: From Proto-Turkic *ked (“back, after”). Cognate with Southern Altai кийин (kiyin), Karakalpak keyin, Kyrgyz кийин (kiyin), Uzbek keyin, Uyghur كېيىن (këyin), Khakas кизін (kizìn, “back”), etc.
sometime, later (at an indefinite point of time in the future) · and then, afterwards, after (it) · almost, nearly (as a shortened version of majdnem, majd is often written in this sense with a final apostrophe, although it is not officially endorsed)
köken: From Proto-Mon-Khmer *krawʔ. Cognate with Muong khau, Mon တြဴ. Attested in Phật thuyết đại báo phụ mẫu ân trọng kinh (佛說大報父母恩重經) as 牢 (MC law) (modern SV: lao) and 娄, alternative form 婁 (MC luw) (modern SV: lâu).
after, afterwards, later, later on (in a moment of time posterior to the reference time)
köken: As adverb (the nowadays more frequent prepositional use is a later development), pēc is the reflex of an earlier pēdis (“after(wards)”), still found dialectally and in folk songs, itself from *pēdies, an old instrumental plural form of pēds, a morphological variant of pēda (“foot sole; footprint”). The original meaning was therefore sequentiality, like footprints: “one after the other,” from…
pēc, kad noticis, visi gudri
jo dzestrāku rīts rasu audis, jo skaidrāka pēc diena būs
jāiet pamielot viešņa arī, lai nerunā pēc, ka mēs tai likuši aiziet tukšā dūšā
köken: Inherited from Old Galician-Portuguese depois, depos, from Vulgar Latin dē post. Cognate with Portuguese depois, Spanish después, and French depuis.