What is the Latin word for hard-hearted?

The usual Latin words for “hard-hearted” are dūrus, ferreus, immītis; also inhūmānus, asper, inexōrābilis. The right choice depends on the sense; see the distinctions below.

English → Latin

“hard-hearted” in Latin

dūrushard; rough; harsh; hardy; vigorous ferreusiron, made of iron; like or pertaining to iron; hard, cruel immītiscruel, rough, harsh; severe, stern; savage inhūmānusinhuman; savage, barbarous; uncivil, unmannerly, churlish, discourteous asperrough, uneven, coarse; unrefined, rude; sharp, newly minted inexōrābilisrelentless, inexorable immānisimmense, enormous, huge, vast; brutal, inhuman, frightful, savage

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

hard-hearted

durus: animi duri: ferreus (that has a heart like steel or flint): immitis (unmerciful): inhumanus (without feeling, inhuman): asper: asperi animi (rough in behavior, without indulgence): inexorabilis: durus atque inexorabilis (inexorable, hard): immanis: immani acerbaque natura (cruel, of cruel character): ☞ dirus, in this sense, is poetical only. To be hard-hearted, duro esse animo or ingenio.

Quick answer

What is the Latin word for hard-hearted?: The usual Latin words for “hard-hearted” are dūrus, ferreus, immītis; also inhūmānus, asper, inexōrābilis. 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.