Hard″ened (–'nd), a. Made hard, or harder, or compact; made unfeeling or callous; made obstinate or obdurate; confirmed in error or vice.
Syn. — Impenetrable; hard; obdurate; callous; unfeeling; unsusceptible; insensible. See Obdurate.
Webster's Dictionary 1913
Hard″ened (–'nd), a. Made hard, or harder, or compact; made unfeeling or callous; made obstinate or obdurate; confirmed in error or vice.
Syn. — Impenetrable; hard; obdurate; callous; unfeeling; unsusceptible; insensible. See Obdurate.