たち

noun

nature; disposition; temperament

Refers to a person's inherent character or temperament. Often used in phrases like たちが悪い (bad-natured) or たちのいい (good-natured).

• 彼かれはたちが悪わるいから気きをつけて。

  He has a bad nature, so be careful.

• あの人ひとはたちがいいね。

  That person has a good disposition, doesn't he?

noun

nature; character; kind

Describes the inherent quality or type of something, not just people. Often used in set phrases like たちの悪い病気 (a nasty illness).

• この風邪かぜはたちが悪わるくて、なかなか治なおらない。

  This cold is a nasty one and just won't go away.