gloaming (n.)
Old English glomung "twilight," formed (probably on model of æfning "evening") from glom "twilight," related to glowan "to glow" (hence "glow of sunrise or sunset"), from Proto-Germanic *glo- (see glow (v.)). Fell from currency except in Yorkshire dialect, but preserved in Scotland and reintroduced by Burns and other Scottish writers after 1785.