extraneous
ik-STRAY-nee-usadjMeaning not belonging; unrelated to the matter at hand
Memory hook EXTRA-neous: EXTRA stuff that doesn’t belong. Pip’s poster about bees has a slice of pizza glued right in the middle: it has nothing to do with bees. The pizza is extraneous.
Remove any extraneous details from your summary.
In context The detective ignored the extraneous gossip about the neighbor’s new car and focused only on the facts that bore on the missing painting.
Similar irrelevant, unrelated, beside the point, outside
Opposite relevant, pertinent, essential
From Latin extraneus, “from outside,” from extra (outside).