KEY: Infirmity.
SYN: Weakness, decrepitude, unsoundness, [See INFIRM].
ANT: Strength, vigor, healthfulness, soundness.

• Irradiate, [See ILLUMINATE]
• Irrational, [See RATIONAL]
• Irreclaimable, [See RECLAIMABLE]
• Irreconcilable, [See RECONCILABLE]
• Irrecoverable
• Irredeemable, [See REDEEMABLE]
• Irreducible
• Irrefragable, [See REFRAGABLE]
• Irrefutable, [See REFRAGABLE]
• Irregular, [See REGULAR]
• Irrelevant, [See RELEVANT]
• Irreligions
• irreligion, [See RELIGION]
• Irremediable, [See REMEDIABLE]
• Irremissible
• Irremovable
• Irreparable, [See REPARABLE]
• Irreprehensible, [See REPREHENSIBLE]
• Irrepressible
• Irreproachable, [See BLAMELESS]
• Irreprovable
• Irresistible, [See RESISTIBLE]
• Irresolute, [See RESOLUTE]
• Irrespective, [See RESPECTIVE]
• Irresponsible