adj. independent, separate, distinct, different, dissimilar, incompatible, inappropriate, foreign, alien, unassociated, unaffiliated, unconnected, uncoupled, unlinked, unallied, uncoordinated: Why raise a totally unrelated issue?
UNRELATED
Meaning of UNRELATED in English
Oxford thesaurus English vocab. Английский словарь Оксфорд тезаурус. 2012