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 melodious is "having a pleasing melody.", the definition for prune is "To reduce by removing excess.", and the definition for hedonism is "Belief that pleasure is the sole aim of life."

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 placebo is "an inactive substance used in medical testing.", the definition for servile is "Fearfully submissive.", and the definition for interminable is "Never ending, or seemingly endless."

The definition for heinous is "Shockingly evil." Used in a sentence: Eduardo's heinous betrayal of Lydia shocked even Latasha, who knew his evil ways. The definition for moderate is "tending toward the average.", the definition for exalt is "To elevate by praise.", and the definition for penurious is "Extrememly stingy."

The definition for pretense is "False intention or purpose." Used in a sentence: The jewel thief entered the mansion under the pretense of fixing a leaky faucet. The definition for plaudits is "enthusiastic approval.", the definition for straddle is "To favor opposing sides.", and the definition for prudent is "Marked by wisdom, shrewd."

The definition for punctual is "On time." Used in a sentence: Ron was worried when the usually punctual Amanda was late for the show. The definition for fickle is "lacking constancy, changeable.", the definition for surplus is "Excess.", and the definition for dubious is "Questionable."