This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
澟 combines the water radical 氵 with 稟, but the exact historical development and original meaning are uncertain.
The water radical 氵 suggests a connection to cold water, but the overall meaning is unclear. Picture icy water flowing beside the component 稟.
For リン, imagine a cold water spring named Rin: the sound Rin cues リン while the water radical keeps the scene cold.