The compound adjective 'steely-eyed' is a relatively modern formation, drawing on the metaphorical strength of two ancient Germanic roots. The first element, 'steel', evokes the unyielding hardness, resilience, and sharpness of the metal, qualities projected onto one's gaze. The second element, 'eye', serves as the window to these qualities, with the '-ed' suffix directly attributing them. The term's logic lies in this powerful visual metaphor: eyes that are not merely looking but are as cold, sharp, and formidable as polished steel, conveying an impression of fierce resolve, unwavering focus, and intimidating determination. It is a descriptive term often applied to characters known for their grit, such as astronauts, soldiers, or decisive leaders.

Structure: steely (adjective suffix) + eyed (adjective suffix) - steely: From English 'steel' (a hard, strong metal) + the adjectival suffix '-y' (meaning "having the qualities of"). Origin: 'Steel' from Old English 'stēle', 'stȳle', of Germanic origin. - eyed: From English 'eye' (the organ of sight) + the adjectival suffix '-ed' (meaning "having" or "characterized by"). Origin: 'Eye' from Old English 'ēage', of Germanic origin.