beach
岸 centers on the edge where land meets water: a beach, shore, or bank.
岸 combines 山 (mountain) with 厈, which likely represents a cliff or bank. Together they suggest a steep shoreline where mountains meet water.
The top 山 is a mountain, and the bottom 厈 looks like a cliff (厂) with a dry bank (干) beside it. Picture a mountain rising straight from the beach, with waves lapping at its base.
For ガン, imagine a gun (ガン) washed up on the beach, half-buried in the sand. The gun -> ガン sound ties the reading to the shoreline scene.
seashore; coast; seaside; waterfront; beach
bank; coast; shore
coast; shore
west coast
gulf coast; bay coast
equinoctial week (when Buddhist services are held)
opposite shore
east coast
west coast; west bank
shore; bank (of a body of water)
riverbank; riverside
red spider lily (Lycoris radiata); cluster amaryllis
riverbank; riverside
quay; wharf; jetty
river dike
right bank (of a river)
eastern coast; east bank
left bank (of a river)
Negishi Line
south coast; south bank