重合

• Pinyin: chóng hé
• Hanzi breakdown: 重 = overlap; 合 = 人 + 一 + 口 = to close/match

Meaning

To coincide; to overlap exactly; to superimpose perfectly.

Used when two things align or match precisely, especially in technical, mathematical, or scheduling contexts. Implies exact correspondence rather than partial overlap.

Examples

1. 两条线的轨迹正好重合。 The paths of the two lines coincide exactly.
2. 她的想法和我的不谋而合，完全重合。 Her idea and mine happened to match perfectly.
3. 这两个图形旋转之后可以完全重合。 These two shapes can completely overlap after rotation.

Usage Guide

Context: mathematics, technical, analysis

Tone: precise

Do Say

• 把这两个三角形重合后可以证明它们全等。(By superimposing these two triangles, we can prove they are congruent.)
• 两份报告的数据完全重合。(The data from the two reports coincide exactly.)

Don't Say

• 我们的时间重合 (For schedule overlap, 重叠 is more natural; 重合 implies exact match)

Origin & History

Compound of 重 (again/overlap) and 合 (to close/match). Together they describe perfect alignment or coincidence.

Cultural Context

Generation: All ages

Social background: Universal