环
huán · HSK 3
ring
💍 huán sounds like 'wan' — one round ring goes round and round
环 contains 王 (jade) on the left — jade rings were classic Chinese ornaments. The right side 不 hints at the sound. Related to 还 (huán, return) — both share the idea of coming back around in a loop.
环 — jade radical 玉/王 + 睘 (huán phonetic)
环 is a phono-semantic compound. The left side 王 (a form of 玉 'jade') gives the meaning, since the original sense was a circular jade ring worn as an ornament. The right side 睘 supplies the sound 'huán'. From 'jade ring' the meaning broadened to 'ring, loop, encircle,' and in modern Chinese also 'environment' in 环境.