unrecallable in British English
(ˌʌnrɪˈkɔːləbəl) adjective. not able to be recalled, revoked, or retrieved in order to change something. not able to be remembered.
Is Unrecallable a word?
from The Century Dictionary.
Not recallable; incapable of being called back, revoked, annulled, or recalled.
What does nonallergic mean?
: not relating to, having, or caused by an allergy : not allergic nonallergic asthma nonallergic children.