From امـ (im- /em-, “to-; this”) + روز (rōz /ruz, “day”), from Middle Persian 𐭫𐭣𐭭𐭤 (im, “this”) + 𐭩𐭥𐭬 (rōz, “day”). Compare Mazanderani ام رو (am ro, “today”), Central Kurdish ئەمڕۆ (emrro, “today”), Northern Kurdish îro (“today”), Northern Luri امڕوو (emrru), Pashto نن ورځ (nan wraź, “today”).