Russian луч

← Proto-Indo-European *lewk- (root)

← Proto-Indo-European *lewk- (inherited)

← Proto-Indo-European *lewk- (mention)

← Old East Slavic лучь (inherited)

← Proto-Slavic *lučь (inherited)

→ English light (cognate)

→ Russian лучевой (affix)

→ Russian излучить (affix)

→ Russian лучить (link)

→ Russian лучик (affix)

→ Russian лучистый (affix)

→ Russian лучезарный (affix)

→ Sanskrit रुच् (cognate)

→ Sanskrit रोक (cognate)