converted to solid form (as concrete)
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
protected against attack (especially by nuclear weapons)
"hardened missile silos"
made hard or flexible or resilient especially by heat treatment
"a sword of tempered steel"
used of persons
"faced a case-hardened judge"
- case hardened - hard boiled