from Latin cavillōsus (from cavilla: a jeering, scoffing, raillery, and -ous; or from Old French cavilleus, -eux in same sense
From: The History of the Valorous and Witty Knight-Errant, Don-Quixote of the Mancha,
Written in Spanish by Michael Cervantes
Translated into English by Thomas Shelton
Printed Verbatim from the Quarto Edition of 1620
Volume II. 1740
Chapter XIII. Wherein in prosecuted the History of the Captive.