1. To an immeasurable degree; beyond measurement
   "the war left him immeasurably fearful of what man can do to man"
   - incalculably 
2. Without bounds
   - boundlessly, infinitely

See also: immeasurable

Antonym: measurably

• irreproducible
• irresistibility
• irresistible
• irresistible impulse
• irresistibleness
• irresistibly
• irresolute
• irresolutely
• irresoluteness
• irresolution
• irresolvable
• irrespective
• irresponsibility
• irresponsible
• irresponsibleness
• irresponsibly
• irresponsive
• irretrievable
• irretrievably
• irreverence
• irreverent
• irreverently
• irreversibility
• irreversible
• irreversible process