(Latin: from, away from, off; down; wholly, entirely, utterly, complete; reverse the action of, undo; the negation or reversal of the notion expressed in the primary or root word)

deferment (s) (noun), deferments (pl)
1. The act of putting off, or an instance of delaying, until a future time: Janice asked her new boss, Mrs. Anderson, for a deferment of one week before she started her new position.
2. Officially sanctioned postponement of compulsory military service: Roger received notice of his deferment by mail the day before he was supposed to have reported for duty in the army.
deferred (adjective), more deferred, most deferred
1. Withheld, suspended, delayed until a future date: The reporters from the local paper waited all night to hear about the deferred decision that the judge would announce.
2. Classified as a temporary, or a permanent, exemption from being inducted into a military service: Horst was very disappointed when he read about his deferred acceptance into the marines until an additional medical examination was completed.
defiance (s) (noun), defiances (pl)
1. Renunciation of faith, allegiance, or amity; a declaration of hostilities.
2. The act of defying or challenging by fighting or a challenge or summons to a combat or contest: "The worker's defiance resulted in a challenge to maintain the objectives of the project or he would take legal action."
defiant (adjective), more defiant, most defiant
Refusing to obey or to take orders from someone: "A defiant protester was shown on TV as he was still shouting and resisting the police."

"There has been a lot of news about defiant people who have been protesting in countries who are unhappy about their economic situations."

defiantly (adverb), more defiantly, most defiantly
defibrillate (verb), defibrillates; defibrillated; defibrillating
To arrest the muscular twitching involving individual muscle fibers of the heart that move without normal coordination: Defibrillating is performed by applying electric shocks across a person's chest which depolarizes the heart cells and allows normal rhythms to return.
defibrillation (s) (noun), defibrillations (pl)
Medical treatment by stopping muscular twitching or irregular contractions of the muscle fibers; especially, of the heart: Defibrillation of abnormal movements of heart muscles is usually treated with electric shocks delivered in an attempt to restore the normal rhythms of the heart.

Defibrillations are used to apply carefully controlled electric shocks that are administered either through a device on the exterior of the chest wall or directly to the exposed heart muscle, to restart or to normalize the rhythms.

defibrillator (s) (noun), defibrillators (pl)
Devices that are used to correct dangerously abnormal heart rhythms; usually, ventricular or sudden muscle spasms or involuntary contractions of a heart muscle or group of muscles or to restart hearts by depolarizing their electrical conduction systems and delivering brief measured electrical shocks to the chest wall or more directly to the heart muscles: The patient's doctor applied a defibrillator to counteract the irregular movements of his heart muscles and and to restore his normal heartbeats by applying a brief electric shock.
deficiency (s) (noun), deficiencies (pl)
deficit (s) (noun), deficits (pl)
defier (s) (noun), defiers (pl)
defile (s) (noun), defiles (pl)
1. A narrow gorge or pass that restricts lateral movement, as of troops.
2. A march in a line.
defile (verb), defiles; defiled; defiling