/ ɪkˈstreɪniəs; NAmE / adjective
extraneous (to sth) ( formal ) not directly connected with the particular situation you are in or the subject you are dealing with
SYN irrelevant :
We do not want any extraneous information on the page.
We shall ignore factors extraneous to the problem.
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WORD ORIGIN
mid 17th cent.: from Latin extraneus + -ous .