unrecoverably
/ˌʌnrɪˈkʌv(ə)rəbli/adverb
In such a way that no recovery, reparation, or cure is possible; irretrievably; unrectifiably; incurably.
- Apparently unattested between the late 17th and late 19th centuries..
Origin
Late 15th century; earliest use found in Reginald Pecock (c1392–?1459), bishop of Chichester and religious author. From unrecoverable + -ly.