noun, noun which may take the genitive case particle 'no', na-adjective
nervous temperament; worrier's disposition
Describes a person who tends to worry easily or is prone to anxiety. Often used as a noun or with な/の to modify nouns.
彼は心配性だから、いつも細かいことを気にする。
He's a worrier, so he always frets over little things.
心配性な性格を直したい。
I want to fix my nervous disposition.