熱ねっ性せい

noun, noun which may take the genitive case particle 'no'

excitable disposition; hot-headedness

Refers to a personality trait of being easily excited or quick to react emotionally. Often used in medical or psychological contexts, but can appear in everyday descriptions of temperament.

• 彼かれは熱ねっ性せいの気き質しつで、すぐに怒おこり出だす。

  He has an excitable disposition and gets angry quickly.

• 熱ねっ性せいの性せい格かくは時ときに周しゅう囲いを困こまらせる。

  A hot-headed personality sometimes troubles those around them.