The definition for placebo is "An inactive substance used in medical testing." Used in a sentence: Tom, who had taken the placebo, found that his allergy symptoms did not go away. The definition for periodic is "occurring at regular intervals.", the definition for stern is "Harsh, severe.", and the definition for gravity is "Importance, significance."

The definition for repel is "To resist, reject." Used in a sentence: The soldiers made a massive charge to repel the invaders. The definition for augment is "to make greater.", the definition for oblivious is "Lacking awareness.", and the definition for revive is "To bring back to life."

The definition for clairvoyance is "Ability to see things beyond ordinary perception." Used in a sentence: Rosa used her clairvoyance to help Alexander find his lost keys. The definition for buffoonery is "foolish behavior.", the definition for flagrant is "Noticeably offensive.", and the definition for awe is "Emotion combining dread and wonder."

The definition for exception is "A case to which the rule does not apply." Used in a sentence: The teacher made an exception and let Gina eat her snack in class. The definition for stealth is "the act of moving secretly or unnoticed.", the definition for clairvoyance is "Ability to see things beyond ordinary perception.", and the definition for preclude is "To rule out in advance."

The definition for derelict is "Abandoned." Used in a sentence: The derelict house was condemned as a public hazard. The definition for procrastinate is "to put off intentionally.", the definition for implement is "To carry out or accomplish.", and the definition for incidental is "Minor."