steely

[ stee-lee ]
/ ˈsti li /

adjective, steel·i·er, steel·i·est.

consisting or made of steel.
resembling or suggesting steel, as in color, strength, or hardness.

Origin of steely

First recorded in 1500–10; steel + -y1
Related formssteel·i·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019