Roots vinc/vict, duc/duct, tract

Vinc/vict

to conquer

invincible

incapable of being overcome or subdued

provincial

a country person

evince

give expression to

duc/duct

Lead

conducive

tending to bring about

induce

cause to do

deduce

to draw a conclusion from given facts

tract

to drag

protracted

Extended in time; Prolonged

intractable

stubborn

retract

formally reject or disavow a formerly held belief, usually under pressure