LATIN DICTIONARYLexicon Latīnum
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“steel” in Latin

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

steel s.
chalybs (general term). ☞ For striking fire, the ancients used either a large nail, called clavus, or a second stone; Vid: Plin., 36, 19, 30.
steel v.
durare: indurate (to harden): confirmare (e.g., animum). To have steeled one’s self against anything, obstinatum esse adversus aliquid (e.g., adversus muliebres lacrimas, Liv.).

Quick answer

What is the Latin word for steel?
The usual Latin words for “steel” are chalybs, dūrō, indūrō; also cōnfirmō, animus. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.