spurt out of the mouth, blow out water
噀 centers on forcefully ejecting liquid from the mouth: spurting or blowing out water.
噀 combines 口 (mouth) with 巽, which likely contributes the sound ソン. The exact historical development of 巽 is uncertain, but the character is used for spurting or blowing out water from the mouth.
The mouth 口 on the left and the complex 巽 on the right look like a mouth with liquid bursting out in all directions. Picture someone blowing water out forcefully.
For ソン, imagine a son playfully spurting water from his mouth: son -> ソン, and the water sprays out.
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