defect
UK: ˈdiːfekt | US: ˈdiːfekt
n. a shortcoming, imperfection, or lack
vi. to desert a cause, country, or organization for another
The word defect originates from Latin defectus ("failure" or "desertion"), combining de- (away) and facere (to do). It originally described a failure to perform or complete something, later evolving to mean both a physical flaw (n.) and the act of abandoning a duty (v.). The dual meanings reflect the logic of "falling short" in action or form.
The product was recalled due to a manufacturing defect.
He defected to a rival company after disagreements with management.
A small defect in the lens caused blurred images.
During the war, several soldiers defected to the enemy side.
The inspector noted a defect in the material's durability.