libation
祼 centers on a ritual pouring of liquid as an offering: a libation. The meaning is narrow and ceremonial, tied to formal religious practice.
祼 combines 示 (altar, religious ceremony) with 果, which likely contributes the sound. The character is associated with ritual pouring of wine or liquid offerings.
At the altar (示), fruit (果) is offered by pouring a libation. Imagine a priest pouring wine over fruit as a sacred offering.
For カン, picture a can of sacred wine being poured at the altar: can -> カン, and the libation flows from the can.