純

Meanings

1. Na-adjective, Taru adjective, Adverb (-to)

   innocent; chaste; naive

2. Prefix

   pure; unmixed; genuine; unalloyed

• いや、あいつは「純じゅん」というより「鈍どん」って感かんじだな。

  No, I feel like he's not "pure", but rather "dull".