1. [syn: case-hardened, hardened, hard-boiled]
The Collaborative International Dictionary of English v.0.48:
Casehardened \Case"hard`ened\, a.
1. Having the surface hardened, as iron tools.
2. Hardened against, or insusceptible to, good influences;
rendered callous by persistence in wrongdoing or
resistance of good influences; -- said of persons.
WordNet (r) 3.0 (2006):
adj 1: used of persons; emotionally hardened; "faced a case-
hardened judge" [syn: case-hardened, hardened, hard-