Antonyms of adj pertinent

2 senses of pertinent

Sense 1
pertinent -- (having precise or logical relevance to the matter at hand; "a list of articles pertinent to the discussion"; "remarks that were to the point")

INDIRECT (VIA relevant) -> irrelevant -- (having no bearing on or connection with the subject at issue; "an irrelevant comment"; "irrelevant allegations")

Sense 2
apposite, apt, pertinent -- (being of striking appropriateness and pertinence; "the successful copywriter is a master of apposite and evocative verbal images"; "an apt reply")

INDIRECT (VIA apropos) -> malapropos -- (of an inappropriate or incorrectly applied nature)

Similarity of adj pertinent

2 senses of pertinent

Sense 1
pertinent -- (having precise or logical relevance to the matter at hand; "a list of articles pertinent to the discussion"; "remarks that were to the point")
       => relevant (vs. irrelevant) -- (having a bearing on or connection with the subject at issue; "the scientist corresponds with colleagues in order to learn about matters relevant to her own research")

Sense 2
apposite, apt, pertinent -- (being of striking appropriateness and pertinence; "the successful copywriter is a master of apposite and evocative verbal images"; "an apt reply")
       => apropos (vs. malapropos) -- (of an appropriate or pertinent nature)