weep
汍 centers on shedding tears: weeping or crying. It is a specific character for the act of weeping, often associated with flowing tears.
汍 combines the water radical 氵 with 丸, which likely contributes a phonetic element. The character is associated with weeping, where the water radical suggests tears.
The water radical 氵 beside 丸 (round) suggests round teardrops flowing. Picture round, watery tears streaming down a face: 汍 means to weep.
For カン, imagine a can filling with round teardrops as someone weeps: can -> カン, and the water radical shows the tears collecting.
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