RIPRAP
Etymology
Noun
riprap (countable and uncountable, plural ripraps)
An underwater bank seen as a danger to shipping.
(chiefly North America) 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)
To form a riprap in or upon.
Source: Wiktionary
Rip"rap`, n. Etym: [Cf. Rap.] (Masonry)
Definition: A foundation or sustaining wall of stones thrown together
without order, as in deep water or on a soft bottom.
Rip"rap`, v. t. [imp. & p. p. Riprapped; p. pr. & vb. n. Riprapping.]
Definition: To form a riprap in or upon.
Source: Webster’s Unabridged Dictionary 1913 Edition