noun
wave erosion
Geomorphological term for erosion of coastlines, cliffs, or shore platforms by wave action.
この海岸の地形は波食によって形成された。
The coastal landform was formed by wave erosion.
浸食 is general erosion by water, wind, or ice, while 波食 specifically refers to erosion by waves.
Compound of 波 (wave) and 食 (eat, erode). The alternate form 波蝕 uses 蝕 (erode, eclipse).