steely (adj.)

• adamant
• adamantine
• ashen
• ashy
• aureate
• beefy
• bony
• bouncing
• brassy
• brazen
• bronze
• bronzy
• callous
• calloused
• canescent
• case-hardened
• cast-iron
• concrete
• constant
• coppery
• corneous
• cuprous
• dappled
• dense
• dingy
• dismal
• dour
• dreary
• dull
• dusty
• ferrous
• firm
• fixed
• flinty
• forceful
• forcible
• full-blooded
• full-strength
• gilt
• glaucous
• gold
• golden
• granitelike
• granitic
• gray
• gray-black
• gray-brown
• gray-green
• gray-white
• grayish
• grey
• grim
• grizzled
• grizzly
• gutsy
• hale
• hard
• hard-core
• hardened
• hardhearted
• hardy
• hearty
• hefty
• horny
• husky
• immovable
• immutable
• impervious
• implacable
• indurate
• inelastic
• inexorable
• inflexible
• insensitive
• intransigent
• inured
• iron
• iron-gray
• ironlike
• irreconcilable
• lead
• leaden
• livid
• loyal
• lusty
• mercurial
• mercurous
• mighty
• mouse-colored
• mousy
• nervy
• obdurate
• obstinate
• osseous
• pachydermatous
• pearly
• potent
• powerful
• puissant
• quicksilver
• red-blooded
• relentless
• resistant
• resistive
• rigid
• rigorous
• robust
• robustious
• rock-ribbed
• rocklike
• rocky
• rugged
• sad
• set
• settled
• silver
• silver-gray
• silvery
• slaty
• smoky
• sober
• solid
• somber
• stalwart
• staunch
• steadfast
• steady
• stern
• stiff
• stonelike
• stony
• stout
• strapping
• strong
• strong-willed
• sturdy
• taupe
• thick-skinned
• tin
• tinny
• tough
• true
• unaffected
• unalterable
• unbending
• unchangeable
• uncompromising
• unflappable
• unmoved
• unrelenting
• unshaken
• unswerving
• unyielding
• vigorous