adj. 25B6; adjective
steely light : BLUE-GREY, grey, steel-coloured, steel-grey, iron-grey.
steely muscles : HARD, firm, toned, rigid, stiff, tense, tensed, taut.
steely eyes : CRUEL, unfeeling, merciless, ruthless, pitiless, heartless, hard-hearted, hard, stony, cold-blooded, cold-hearted, harsh, callous, severe, unrelenting, unpitying, unforgiving, uncaring, unsympathetic; poetic/literary adamantine.
steely determination : RESOLUTE, firm, steadfast, dogged, single-minded; bitter, burning, ferocious, fanatical; ruthless, iron, grim, gritty; unquenchable, unflinching, unswerving, unfaltering, untiring, unwavering.
flabby, kind, half-hearted.