KanjiJLPT N2
Jammed In

jammed in, shellfish, mediate, concern oneself with

Mnemonic

An arrow like symbol facing upward — pointing to something that is jammed in.

Details

The keyword for 介 is jammed in. This kanji conveys the idea of something being squeezed or inserted between two other things, like a person caught in the middle. It carries the sense of mediation or intervention, as one who is jammed in between two parties often serves as an intermediary. By extension, it relates to the concepts of being sandwiched, introducing, or acting as a go-between.
On'yomi
かい

Used in kanji