介

Pictographic/Ideographic origin:

Shows a person (人) standing between two dots or strokes (丶丶) — representing “a person wedged between two things.”

Because of this imagery, the core idea of 介 is “something in between.”

By extension, it also carries meanings like “introduce,” “involve,” “interpose,” and appears in many compounds about mediation or participation (e.g., 介入 intervene, 紹介 introduce).

In Korean, it is read 개 and often appears in Sino-Korean words like 소개 (introduction), 중개 (brokerage), 개입 (intervention).

Common in compounds such as:

紹介 (소개) – introduction;

介入 (개입) – intervention;

媒介 (매개) – medium, mediator;

仲介 (중개) – brokerage.