JMdict: 1611910

無心 【むしん】

  1. [adj-na,adj-no,n] innocence
  2. [adj-na,n,adj-no] insentient (i.e. plants, inanimate objects, etc.)
  3. [adj-na,n,adj-no] free from obstructive thoughts
  4. [vs,vt] to pester someone (for cash, etc.)
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Kanji in this word:

Kanji Meanings On Readings Kun Readings
Nothingness, None, Ain't, Nothing, Nil, Not ム, ブ な.い
Heart, Mind, Spirit, Heart Radical (no. 61) シン こころ, -ごころ

Words often seen with this one: (experimental feature)

こと (12),  (10)