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Vinony

know-it-all

noun

  1. person who obnoxiously purports an expansive comprehension of a topic
L846060 on Wikidata ↗

Wiktionary

Pronunciation: /ˈnəʉ.ɪt.oːl/

noun

Etymology: Etymology tree English know English it Proto-Indo-European *h₂el-der.? Proto-Indo-European *h₂elnós Proto-Germanic *allaz Proto-West Germanic *all Old English eall Middle English all English all English know-it-all From know + it + all.

  1. Someone who claims to be knowledgeable or an expert in something, obnoxiously dismissing the opinions, advice, suggestions, etc. of others.

    “We had it all figured out, but this know-it-all marched in with "the correct way of solving it", leaving our experiment in shambles.”

    “The same holds true for supporting details—they help you to learn more about a topic. Be a know it all by sharing these details and supporting details with friends.”