Answer: HARDENED

AnswerCrossword Clue
HARDENEDGot set
HARDENEDMade tougher
HARDENEDGot tough
HARDENEDCallous.
HARDENEDCallous
HARDENEDMade callous
HARDENEDLike some criminals
HARDENEDSet
HARDENEDMade unfeeling, as a heart
hardenedHARDEN, to make hard (firm and unyielding)
hardenedExperienced in a particular job or activity and therefore not easily upset by its more unpleasant aspects
hardenedStrengthened or made secure against attack, esp. by nuclear weapons
hardenedUtterly fixed in a habit or way of life seen as bad
hardenedHaving become or been made hard or harder