Meaning : Used of persons. Emotionally hardened.

Example : Faced a case-hardened judge.

Synonyms : case-hardened, hard-boiled

Meaning : Made hard or flexible or resilient especially by heat treatment.

Example : A sword of tempered steel.
Tempered glass.

Synonyms : tempered, toughened, treated

Meaning : Protected against attack (especially by nuclear weapons).

Example : Hardened missile silos.

Meaning : Made tough by habitual exposure.

Example : Hardened fishermen.
A peasant, dark, lean-faced, wind-inured.
Our successors...may be graver, more inured and equable men.

Synonyms : enured, inured

Meaning : Converted to solid form (as concrete).

Synonyms : set