ETYMOLOGY
from Old French barateus, from barat: masculine (= It. baratto, Old Spanish barato, Provencal barat), also Old French barate feminine (= Old Spanish, Catalan, Provencal barata) ‘deceit, fraud, confusion, trouble, embarrassment’ + -ous
EXAMPLE
“… For other Analyses he ouerpassed, as impertinent, or not specially materiall. After such examination of their autorities, and argumentes, not with a rigorous Censure of either, but with a fauorable Construction of both: Pardon him, though he presume to deliuer some part of his animaduersions in such termes, as the instant occasion presenteth: not for any contentious, or sinister purpose (the world is too-full of litigious, and barratous pennes) but for the satisfaction of those, that de∣sire them, & the aduertisement of those, that regard them. …”
From: Pierces Supererogation or A New Prayse of the Old Asse
By Gabriel Harvey, 1593
Lexicophilia 