What does the NA mean in this sentence?

Sonna baka NA koto...


Normally, (you) don't say such a stupid thing

  • 1
    It indicates that the previous word is an adjective.
    – Ringil
    Apr 7, 2016 at 22:02
  • D'oh! I just read baka was a noun and didn't really think about it being an adjective too. Sorry.
    – Robb
    Apr 7, 2016 at 22:44

1 Answer 1


For the etymology of both : Are な and だ both copula verbs?

In modern japanese, な is the modifying form of the copula and だ is its conclusive form.

So yeah, as Ringil said, it just means that バカ modifies こと : "a stupid thing".

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