What's the difference between irremissible and unpardonable?

Irremissible


Definition:

  • (a.) Not remissible; unpardonable; as, irremissible crimes.

Example Sentences:

  • (1) Anamnesis and clinical investigations are irremissible for the evaluation of congestive heart failure.

Unpardonable


Definition:

Example Sentences:

  • (1) The country’s defence minister, Han Min-koo, said the nuclear test was an “unpardonable provocation seriously threatening peace and stability in the entire Asia-Pacific region and the Korean peninsula”.
  • (2) To even consider building new runways and coal-fired power stations at this juncture in history is an unpardonable folly, but Gordon Brown seems determined to stumble forward regardless with his ill-conceived plans in the face of the science and widespread public opposition."
  • (3) Abstention from radiological investigation as a primary requisite is unpardonable and can leave irreversible sequels.