pour
灌 centers on pouring liquid, especially in a directed or controlled way, such as irrigating fields or filling a container.
灌 combines 氵 (water) with 雚, which likely contributes the sound and may relate to a heron or a pouring action. The exact historical development of 雚 is uncertain.
Water 氵 pours from a heron-shaped vessel 雚, irrigating the fields below.
For カン, imagine pouring water from a can: can -> カン, and the water flows out in a steady stream.
irrigation
bush; shrub
consecration ritual for the conferral of the status of Acharya (in esoteric Buddhism)
washing a corpse for burial
service celebrating the birth of the Buddha (held on April 8); Buddha's birthday festival
irrigation; lavage; affusion; douche
perfusion
perfusion pressure
irrigation water
irrigation farming
baptism-like ceremony performed by the buddhas on a bodhisattva who attains buddhahood