Steely/ˈstiːli/ Definition 1 of 3Pro Tip 1/3Visual Imagery Think of the shiny, hard surface of steel to grasp 'steely' in this context. The protagonist's steely eyes mirrored the unwavering resolve within. Pro Tip 2/3Metaphorical Strength Use 'steely' to describe mental strength that's as tough as the metal. She faced the challenge with a steely nerve. Pro Tip 3/3Not Physical 'Steely' is about character or looks, not physical hardness. His steely commitment never waned.