The definition for avian is "Relating to birds." Used in a sentence: The old man affectionately referred to pigeons as his "avian friends." The definition for comprehensible is "understandable.", the definition for euphoria is "Feeling of great happiness.", and the definition for straddle is "To favor opposing sides."

The definition for negate is "To make invalid." Used in a sentence: Paula negated Tiffany's argument by proving that her main premise was false. The definition for euphoria is "feeling of great happiness.", the definition for exasperation is "The state of being irritated.", and the definition for authoritarian is "Favoring absolute obedience to authority."

The definition for fraud is "Trick." Used in a sentence: The con man's fraud involved selling swampland to gullible investors. The definition for stifle is "to repress or discourage.", the definition for aesthete is "Person having or affecting sensitivity to beauty.", and the definition for extenuating is "Partially excusing."

The definition for appalling is "Inspiring dismay or disgust." Used in a sentence: Hector found his roommate's habit of leaving his dirty socks on the floor appalling. The definition for unscrupulous is "lacking principles.", the definition for penurious is "Extrememly stingy.", and the definition for apathetic is "Showing little or no emotion."

The definition for colossal is "Immense, enormous." Used in a sentence: After pushing with all his might, Frank realized he could never move the colossal boulder. The definition for pantomime is "telling a story through gestures.", the definition for derivative is "Lacking originality.", and the definition for incumbent is "Necessary as a duty or responsibility."