The definition for perception is "Capacity for seeing or understanding." Used in a sentence: His incredible perception made him the best detective on the force. The definition for impenitent is "lacking remorse.", the definition for naive is "Lacking worldy wisdom.", and the definition for stern is "Harsh, severe."

The definition for abate is "Become less in amount or intensity." Used in a sentence: Just when it seemed the rain would never stop, the storm suddenly began to abate. The definition for beneficial is "helpful.", the definition for incidental is "Minor.", and the definition for redouble is "To make twice as great."

The definition for serenity is "Calmness." Used in a sentence: The serenity of the glassy sea soothed the sailors after the big storm. The definition for commemorate is "to mark by a ceremony.", the definition for diffident is "Lacking self–confidence.", and the definition for servile is "Fearfully submissive."

The definition for rail is "To scold in harsh language." Used in a sentence: Clay began to cry as his irate manager railed at him for missing the deadline. The definition for defiant is "showing bold resistance.", the definition for deferment is "The act of delaying.", and the definition for fragile is "Delicate."

The definition for combative is "Eager to fight." Used in a sentence: The teacher suggested the combative student channel his aggression into boxing. The definition for placebo is "an inactive substance used in medical testing.", the definition for catastrophic is "Relating to extreme misfortune.", and the definition for appalling is "Inspiring dismay or disgust."