nugacious
Trivial, trifling or of little importance.
archaic
How many are the ſpurious Authors of theſe Arts; that have uſurped to themſelves the names and titles of holy men, and of men more famous in their own way; on purpoſe to vend their nugacious fables, and preſtigious impoſtures with more eſteem?
Where it comes from
From Latin nūgax, nūgācis (“trifling”) + -ous.
Adapted from the Wiktionary entry nugacious (CC BY-SA 4.0).