unpertaining
/(ˌ)ʌnpəˈteɪnɪŋ/adjective
Not pertaining; having no connection or relevance (to). Chiefly in predicative use.
Origin
Late Middle English; earliest use found in Reginald Pecock (c1392–?1459), bishop of Chichester and religious author. From un- + pertaining, present participle of pertain.