day, sun, radiant, shining

Examples:

Li demê havînê bi milyona xelk xwe didin ber tava rojê da ku esmer bin – During the summer millions of people lie in the sun to get a tan.

Etymology:

Proto-Indo-European root meaning (*leuk-) = “light, brightness;”
From Avestan (Av.) raoxshnem [raoxshna], raocah- = “radiant, shining, bright;”
Sanskrit rocate “shines;”
Greek leukos “bright, shining, white;”
Latin lucere “to shine,” lux “light,” lucidus “clear;”
Old Church Slavonic luci “light;”
Lithuanian laukas “pale;”
Welsh llug “gleam, glimmer;”
Old Irish loche “lightning,” luchair “brightness;”
Hittite lukezi “is bright;”
Old English leht, leoht “light, daylight; spiritual illumination,”
German Licht,
Gothic liuhaþ “light.”

Other forms:
roz, roc, ruz