unretractable1
/(ˌ)ʌnrɪˈtraktəbl/adjective
That cannot be revoked, rescinded, gone back on, undone, or unsaid; irrevocable.
Origin
Early 17th century; earliest use found in George Carleton (?1558–1628), bishop of Chichester. From un- + retract + -able.
unretractable2
/(ˌ)ʌnrɪˈtraktəbl/adjective
That cannot be drawn back, in, up, etc.
Origin
Late 19th century; earliest use found in Samuel David Gross (1805–1884). From un- + retractable.