ˈjaktən(t)s noun
or jac·tan·cy -nsē
( plural jactances or jactancies )
Etymology: Middle French & Latin; Middle French jactance, from Latin jactantia, from jactant-, jactans (present participle of jactare to throw, shake, speak out, boast) + -ia -y — more at jet
: vainglorious boasting
jactance , vanity, peculation to the ruin of 20 years' labor — Ezra Pound