bright-eyed

the compound adjective 'bright-eyed' is a native english formation, combining two elements of germanic origin. the first element, 'bright', descends from the old english 'beorht', itself from proto-germanic 'berhtaz', meaning shining or brilliant. the second element, '-eyed', originates from old english 'ēage' for 'eye', with the adjectival suffix '-ed' used to denote possession of a specific feature. the literal combination, 'having bright eyes', was used to describe the physical appearance of alertness or health in animals and humans. over time, this vivid physical description underwent semantic extension, becoming a metaphor for a mental or emotional state—specifically, the eager, optimistic, and innocent enthusiasm characteristic of youth or keen interest, as shining eyes are a visible sign of such excitement.

Structure: bright (shining) + eyed (having eyes) bright (old english, meaning 'shining, clear, splendid'; functions as an adjective describing a quality) + eyed (old english, from 'ēage' (eye) + the suffix '-ed', meaning 'having or provided with'; functions as a suffix forming an adjective)