zhè gè cí bǐjiào zhèngshì, rìcháng liáotiān bù yīdìng chángyòng, dàn zài jiěshì fùzá jiātíng guānxì shí huì chūxiàn

这个词比较正式，日常聊天不一定常用，但在解释复杂家庭关系时会出现。

This word is relatively formal; it's not necessarily used in everyday conversation, but it appears when explaining complex family relationships.