wild hair
鬖 centers on hair that is untamed and disheveled: wild, unruly hair that sticks out or flows loosely.
鬖 combines 髟 (hair) with 參, which likely contributes the sound and possibly the idea of mixing or irregularity, suggesting hair that is tangled or wild.
The top 髟 shows long hair, and the bottom 參 looks like a tangled mess of lines. Picture a head of hair so wild it looks like a scribble.
For サン, imagine the sun (サン) beating down on wild, frizzy hair, making it even more unruly: sun -> サン.
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