O

adj. Hardened in feelings, esp. against moral or mollifying influences; unyielding; hard-hearted; stubbornly wicked. Hard; harsh; rugged; rough; intractable. Sometimes accented on the second syllable, especially by the older poets.

Syn. - Hard; firm; unbending; inflexible; unyielding; stubborn; obstinate; impenitent; callous; unfeeling; insensible; unsusceptible. - Obdurate, Hardened. Callous denotes a deadening of the sensibilities; as. a callous conscience. Hardened implies a general and settled disregard for the claims of interest, duty, and sympathy; as, hardened in vice. Obdurate implies an active resistance of the heart and will against the pleadings of compassion and humanity.

 - vb. To harden.