環

Phono-semantic compound:

玉 (jade, jewel) – semantic element, relating to precious stones and ornaments;

睘 (to look around, encircle) – phonetic element

Together, the character conveys the image of a jade ornament in circular form, later extended to mean circle, surrounding, ring.

Commonly appears in compounds indicating cycles, circles, surroundings, or environments.

환경 (環境) – environment

순환 (循環) – circulation

환상 (環狀) – ring-shaped, annular

환호 (環護) – to surround and protect

고리 환 (環) – used literally to mean "ring"