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callous (adj.)
c. 1400, "hardened," in the physical sense, from Latin callosus "thick-skinned," from callus, callum "hard skin" (see callus). The figurative sense of "unfeeling, hardened in the mind" appeared in English by 1670s. Related: Callously; callousness.
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Definitions of callous
Dictionary entries near callous
calliper
callipygian
Callisto
callithumpian
callosal
callous
callow
callus
calm
calmative
calmly