二に面めん性せい

noun

dual nature; two-sidedness; two-facedness

Refers to a person, thing, or concept having two contrasting aspects or faces, often with a nuance of contradiction or hidden side.

• 彼かれの二に面めん性せいには驚おどろかされる。

  I'm surprised by his dual nature.

• この政せい策さくには二に面めん性せいがある。

  This policy has two sides to it.