Inexpiable

adj

Definitions

Adjective
  1. 1
    That cannot be expiated or atoned for; unforgivable.

    "[…] the only son of that disgraced and blood-stained nobleman, who, lying in gaol, under sentence of death for a foul and cowardly murder, swallowed poison, and so closed his guilty life with a tremendous crime, in its nature inexpiable."

Adjective
  1. 1
    incapable of being atoned for wordnet

Etymology

From in- + expiable.

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