JMdict: 2404260

知ったことじゃない 【しったことではない】

  1. [exp,adj-i] to be of no concern to one; to be nothing to do with one
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Kanji in this word:

Kanji Meanings On Readings Kun Readings
知 Know, Wisdom チ し.る, し.らせる

Words often seen with this one: (experimental feature)

どう (13), そんな (10)