合

合 depicts the concept of two things coming together and fitting as one.

Considered an ideogrammic compound 合 formed from:

亼 (삼합 집) – an ancient form representing “three coming together” or a reversed “mouth” shape;

口 (구, “mouth”).

Together, they suggest “two mouths coming together,” expressing the idea of “matching,” “joining,” or “fitting.”

Some scholars alternatively interpret:

亼 as a lid;

口 as a bowl or vessel.

Thus, the character depicts “a lid fitting on a container,” symbolizing things that match or fit together perfectly.

It also has the meaning of a measurement unit, read as “홉” in Korean (≈180 ml), though in digital input it usually converts only to 합.