KEY: Obdurate.
SYN: Hardened, obstinate, stubborn, impenitent, reprobate, callous,unfeeling, insensible, unyielding.
ANT: Softened, flexible, tender, teachable, yielding, penitent,docile, amenable.

• Ingenuous
• Inglorious
• Ingraft, [See GRAFT]
• Ingratiate
• Ingratitude, [See GRATITUDE]
• Ingredient
• Ingress, [See EGRESS]
• Ingurgitate, [See SWALLOW]
• Inhabile, [{See *ni and AWK}?]
• Inhabit
• Inhabitant
• Inhale
• Inharmonious, [See HARMONIOUS]
• Inherent
• Inherit
• Inheritance
• Inheritor
• Inhesion
• Inhibit
• Inhospitable, [See HOSPITABLE], Inhuman, [See HUMAN], Inhume,
• Inimical, [See false_and_GROUNDLESS]
• Inimitable
• Iniquity
• Initiate, [See INAUGURATE]
• Initiative