inexpiable

adjective

in·​ex·​pi·​a·​ble (ˌ)i-ˈnek-spē-ə-bəl 

1

: not capable of being atoned for

2

obsolete : implacable, unappeasable

inexpiably

(ˌ)i-ˈnek-spē-ə-blē 

adverb

Synonyms

• indefensible
• inexcusable
• insupportable
• unforgivable
• unjustifiable
• unpardonable
• unwarrantable

Examples of inexpiable in a Sentence

apparently, the gubernatorial candidate is guilty of the inexpiable sin of speaking out too openly and honestly about the state's financial woes

Word History

Etymology

Middle English inexpyable, from Latin inexpiabilis, from in- + expiare to expiate

First Known Use

15th century, in the meaning defined at sense 1