The definition for naive is "Lacking worldy wisdom." Used in a sentence: The naive Simon assumed that everyone was as simple and kind as he was. The definition for revoke is "to cancel by taking back.", the definition for appalling is "Inspiring dismay or disgust.", and the definition for pretentious is "Making unjustified claims."

The definition for oblivious is "Lacking awareness." Used in a sentence: Love–struck Charlie was oblivious to everyone but the object of his affection. The definition for regurgitate is "to pour out or throw back.", the definition for heinous is "Shockingly evil.", and the definition for authoritarian is "Favoring absolute obedience to authority."

The definition for stern is "Harsh, severe." Used in a sentence: The stern principal canceled the prom after the seniors played a silly prank. The definition for fragile is "delicate.", the definition for stealth is "The act of moving secretly or unnoticed.", and the definition for diffident is "Lacking self–confidence."

The definition for unscrupulous is "Lacking principles." Used in a sentence: The unscrupulous salesman was fired for lying to his customers. The definition for stern is "harsh, severe.", the definition for unscrupulous is "Lacking principles.", and the definition for epistolary is "Contained or carried on in letters."

The definition for catastrophic is "Relating to extreme misfortune." Used in a sentence: The effects of the massive hurricane were catastrophic. The definition for placebo is "an inactive substance used in medical testing.", the definition for rehash is "To discuss again.", and the definition for inflammatory is "Tending to excite anger."