brightyoudaoicibaDictYouDict
bright: [OE] Bright is a word of ancient origins, going back to Indo-European *bhereg-, which has produced a range of words with the same general meaning in a range of Indo-European languages (for example Sanskrit bhrājate ‘shine’). The Germanic derivative was *berkhtaz, which produced a number of offspring amongst the early Germanic languages, including Old English beorht, Old High German beraht, and Old Norse bjartr, all now lost except English bright.
bright (adj.)youdaoicibaDictYouDict
Old English bryht, by metathesis from beorht "bright; splendid; clear-sounding; beautiful; divine," from Proto-Germanic *berhta- "bright" (cognates: Old Saxon berht, Old Norse bjartr, Old High German beraht, Gothic bairhts "bright"), from PIE root *bhereg- "to gleam, white" (cognates: Sanskrit bhrajate "shines, glitters," Lithuanian breksta "to dawn," Welsh berth "bright, beautiful"). Meaning "quick-witted" is from 1741.