seawall

Mane (Îngilîzî)

A coastal defence in the form of a wall or an embankment.

Hevwate

breakwater

bulwark

jetty

mole

groin

groyne

coastal levee

sea wall

sea bank

sea embankment

sea-wall

tide embankment

sea dyke

digue

dike

levee

pier

Werger

Deich

digue

zeedijk

dique

espigó

Damm

aine

brise-lames

jetée

mole

taupe

engonal

frangiflutti

scogliera

antemurale

Etîmolojî (Îngilîzî)

Ji Middle English mîras hatiye girtin: se-walle

Ji Old English mîras hatiye girtin: sǣweall

In summary

From Middle English se-walle, from Old English sǣweall (“seawall”), equivalent to sea + wall.