late 14c., "divergence from a right course, transgression," from Old French prevaricacion "breaking of God's laws, disobedience (to the Faith)" (12c., Modern French prévarication) and directly from Latin praevaricationem (nominative praevaricatio) "duplicity, collusion, a stepping out of line (of duty or behavior)," noun of action from past participle stem of praevaricari "to make a sham accusation, deviate," literally "walk crookedly," in Church Latin, "to transgress," from prae "before" (see pre-) + varicare "to straddle," from varicus "straddling," from varus "bowlegged, knock-kneed" (see varus). Meaning "evasion, quibbling" is attested from 1650s.