缓
huǎn · HSK 7
slow
🐌 缓 = silk thread 纟 + 爰; a slack, loose thread moves slow
The 纟 (silk) radical plus 爰 gives the sense of a loosened, slackened cord. A thread with no tension drags and gives way gradually, matching the meanings slow, unhurried, and gradual.
缓 — silk radical 纟 + 爰 (yuán, phonetic)
A semantic-phonetic compound. The silk radical 纟 suggests loosening or slackening cords, while 爰 (yuán) supplies the sound, shifted to huǎn. From the literal sense of 'loose threads' it broadened to mean slow, relaxed, or to delay.