Adjective callous has 1 sense
- callous, thick-skinned, indurate, pachydermatous - emotionally hardened; "a callous indifference to suffering"; "cold-blooded and indurate to public opinion"
Antonym: sensitive (indirect, via insensitive)
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Verb callous has 1 sense
- callous, cauterize, cauterise - make insensitive or callous; deaden feelings or morals
--1 is one way to inure, harden, indurate
Sample sentence:
Something ----s somebody
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