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 futile is "without purpose, completely ineffective.", the definition for extant is "Currently existing.", and the definition for duplicity is "Deceptive thought, speech, or action."

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 trove is "valuable collection.", the definition for perception is "Capacity for seeing or understanding.", and the definition for negate is "To make invalid."

The definition for derelict is "Abandoned." Used in a sentence: The derelict house was condemned as a public hazard. The definition for surplus is "excess.", the definition for exalt is "To elevate by praise.", and the definition for repentant is "Feeling regret."

The definition for plaudits is "Enthusiastic approval." Used in a sentence: Allison's painting met with plaudits from the critics, who had dismissed her earlier work. The definition for incisive is "impressively direct and decisive.", the definition for regale is "To amuse.", and the definition for pretense is "False intention or purpose."

The definition for advantageous is "Giving an advantage." Used in a sentence: The house's location in the best school district was advantageous to the seller. The definition for apathetic is "showing little or no emotion.", the definition for interminable is "Never ending, or seemingly endless.", and the definition for repel is "To resist, reject."