Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- adj. Impossible to expiate or atone for: inexpiable crimes.
- adj. Obsolete Implacable.
Century Dictionary and Cyclopedia
- Not to be expiated; admitting of no expiation or atonement: as, an inexpiable crime or offense.
- Not to be satisfied or appeased by expiation; implacable.
Wiktionary
- adj. both unforgivable and inexplicable
GNU Webster's 1913
- adj. Admitting of no expiation, atonement, or satisfaction.
- adj. Archaic Incapable of being mollified or appeased; relentless; implacable.
WordNet 3.0
- adj. incapable of being atoned for
Examples
“For he now lived inside the words of Omar, the ghost's plaintive smile staved his soul of its inexpiable guilt.”
“Now, it required no conjurer to foresee, that should Francis commit this inexpiable crime of secretly allying himself with a”
“And to impress upon me that I had done nothing inexpiable.”
“A new Ahasuerus, cursed by inexpiable crime, yet sustained by a great purpose.”
“I had the power, if I could raise myself to will it, and yet again had not the power, for the weight of twenty Atlantics was upon me, or the oppression of inexpiable guilt.”
“The desperate squeakings about the old house on windy nights that to Anthony were burglars with revolvers ready in hand represented to Gloria the auras, evil and restive, of dead generations, expiating the inexpiable upon the ancient and romantic hearth.”
“They confess that the cause why they persecuted their brother was his having dreamed; as if truly this ass an inexpiable offense; but if they are indignant at his dreams, why do they not rather wage war with God?”
“And first, he reproves their ingratitude, because, when they had been so kindly received, they made the worst possible return; next, he contends that the crime was inexpiable, because they had stolen what was most valuable to him; namely, the cup in which he was accustomed both to drink and to divine.”
“Son, as to his distinct person, may be blasphemed; so it is said here expressly; -- and thereon it is added that the Holy Ghost also may be distinctly blasphemed, or be the immediate object of that sin which is declared to be inexpiable.”
“And who would not take this for an inexpiable crime in any, especially in him who has written so much of the nature and use of threatening under the gospel, and the fear that ought to be in generated by them in the hearts of men, as”
Lists
These user-created lists contain the word ‘inexpiable’.
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phrontistery - i
from phrontistery.info
izzat, izzard, ixiodic, izard, ivresse, ixora, ivorist, ivoride, ivorine, iulus, iulan, ithomiid and 510 more...
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words 2
janiform, remora, sprat, stoa, sone, lea, scow, atoll, Weltschmerz, barmy, concupiscent, actinic and 18 more...
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discoveries
These are lexical items new to me that I've discovered in actual use (i.e. not in dictionaries, lists, or this site).
Looking back over this list, I haven't the slightest idea what mos...haymow, hawsepipe, stridor, bariatric, autotelic, apotropaic, cyanotype, tourelle, autobody, zudecca, stifado, corbeille and 1073 more...
Tweets
Looking for tweets for inexpiable.

qroqqa 'If I had broke the cup, madam,' Mr. Sumelin answered, 'it would have been a crime inexpiable but by a new set. This is, I suppose, a regular tax upon husbands; I submit to it; but I really cannot submit to the not being allowed to scald my own fingers.'
—Robert Bage, 1796, Hermsprong Mar 21, 2009