different between riprap vs seawall

English

Etymology

Apparently a reduplication (with vowel dissimilation) of rap (“blow, stroke”).

Pronunciation

• (UK) IPA^(key): /???p?ap/

Noun

riprap (countable and uncountable, plural ripraps)

1. An underwater bank seen as a danger to shipping.
   • 1982, TC Boyle, Water Music, Penguin 2006, p. 423:

     They hold on, spray flying, the ceaseless racket of water impacting on rock all but swallowing them, the river pitching dizzily, snags and riprap raking like claws at the bottom of the boat.

2. (chiefly Canada, US) Rocks or other materials used to shore up an embankment, deter or prevent erosion, guide shipping, or serve as a temporary mooring.

Verb

riprap (third-person singular simple present ripraps, present participle riprapping, simple past and past participle riprapped)

1. To form a riprap in or upon.

Cebuano

Etymology

From English riprap.

Pronunciation

• Hyphenation: rip?rap

Noun

riprap

1. a riprap rocks or other materials used to shore up an embankment, deter or prevent erosion, guide shipping, or serve as a temporary mooring

Verb

riprap

1. to riprap

English

Etymology

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

Noun

seawall (plural seawalls)

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

Alternative forms

• sea wall

Translations

See also

• breakwater
• groyne