Etymology

From Old Persian [script needed] ‎(raučah-, “day”), from Proto-Iranian [Term?] (compare Avestan 𐬭𐬀𐬊𐬗𐬀𐬵 ‎(raočah, “light, day”)), from Proto-Indo-Iranian [Term?] (compare Sanskrit रोचते ‎(rocate, “to shine, to be bright”)), from Proto-Indo-European *lewk- ‎(“bright, to shine, to see”) (compare English light).

Logogram from Aramaic 𐡉𐡅𐡌 ‎(yawm, “day”).