交集

• ピンイン: jiāo jí
• 漢字の分解: 交 = crossed legs, to intersect; 集 = 隹 (bird) + 木 (tree) — birds gathering on a tree, a collection

意味

交わり（共通部分）；重なり

Originally a mathematical term referring to the set of elements common to two or more sets. Now widely used in everyday speech to describe overlapping interests, experiences, or social circles. When used with emotions, often appears in the phrase 百感交集 (a flood of mixed emotions).

例文

1. 我们的社交圈几乎没有交集，所以很少见面。
2. 听到这个消息，她百感交集，不知道该笑还是该哭。
3. 两个看似毫不相关的领域，其实在技术层面有很大的交集。

使い方ガイド

場面: mathematics, everyday, relationships

トーン: neutral

正しい言い方

• 我们俩的爱好有不少交集。(The two of us share quite a few common interests.)
• 获奖那一刻，他百感交集。(At the moment he received the award, he was overwhelmed with mixed emotions.)

避ける言い方

• 用'交集'来表示物理上的交叉点 (Don't use 交集 for a physical intersection like a crossroads — use 交叉口 or 十字路口 instead)

起源と歴史

Composed of 交 (to intersect; to cross) + 集 (set; collection). Originally a mathematical term borrowed into everyday language.

文化的背景

世代: All ages

社会的背景: Educated speakers