The definition for retroactive is "effective as of a prior time or condition." Used in a sentence: The retroactive law made even past infractions punishable. The definition for discern is "to recognize as separate as distinct.", the definition for oblivious is "Lacking awareness.", and the definition for catastrophic is "Relating to extreme misfortune."

The definition for preclude is "To rule out in advance." Used in a sentence: "Having cake now will preclude dessert later," said Amber's mother. The definition for lurid is "causing horror, shocking.", the definition for awe is "Emotion combining dread and wonder.", and the definition for comprehensible is "Understandable."

The definition for civility is "Politeness." Used in a sentence: The usually unruly Thomas acted with great civility when his favorite uncle visited. The definition for negate is "to make invalid.", the definition for accommodate is "To give consideration to.", and the definition for egotist is "Self–important person."

The definition for augment is "To make greater." Used in a sentence: Wanda read the dictionary every night to augment her vocabulary. The definition for impenitent is "lacking remorse.", the definition for lenient is "Mild or tolerant.", and the definition for brandish is "To shake or wave menacingly."

The definition for scamper is "To run quickly." Used in a sentence: The frightened kitten scampered away from the butterfly. The definition for extenuating is "partially excusing.", the definition for antidote is "Something that relieves or counteracts.", and the definition for clairvoyance is "Ability to see things beyond ordinary perception."