"hardened" in the verb sense
1. harden, indurate
become hard or harder
"The wax hardened"
2. harden, indurate
make hard or harder
"The cold hardened the butter"
3. temper, harden
harden by reheating and cooling in oil
4. season, harden
"This trip will season even the hardiest traveller"
5. inure, harden, indurate
cause to accept or become hardened to habituate
"He was inured to the cold"
"hardened" in the adjective sense
1. case-hardened, hardened, hard-boiled
used of persons emotionally hardened
"faced a case-hardened judge"
2. tempered, treated, hardened, toughened
made hard or flexible or resilient especially by heat treatment
"a sword of tempered steel"
protected against attack (especially by nuclear weapons
"hardened missile silos"
4. enured, inured, hardened
made tough by habitual exposure
"a peasant, dark, lean-faced, wind-inured"- Robert Lynd
"our successors...may be graver, more inured and equable men"- V.S.Pritchett
5. hardened, set
converted to solid form (as concrete)
Source: WordNet® (An amazing lexical database of English)
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