Word Study
Waul
CIDE DICTIONARY
Waul, v. i. [Of imitative origin.].
To cry as a cat; to squall; to wail. [1913 Webster]
"The helpless infant, coming wauling and crying into the world." [1913 Webster]
OXFORD DICTIONARY
Waul, v.intr. (also wawl) give a loud plaintive cry like a cat.
Etymology
imit.
For further exploring for "Waul" in Webster Dictionary Online