The definition for corroborate is "To support with evidence." Used in a sentence: "Unless you can corroborate your story, it will not be admissible in court," the attorney told his client. The definition for precept is "a general rule of action.", the definition for placebo is "An inactive substance used in medical testing.", and the definition for heinous is "Shockingly evil."

The definition for incisive is "Impressively direct and decisive." Used in a sentence: Samir's incisive leadership made him the natural choice for president of the company. The definition for condone is "to treat as acceptable.", the definition for insolence is "Boldness or rudeness.", and the definition for colossal is "Immense, enormous."

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 pomp is "showy display.", the definition for onset is "Beginning.", and the definition for impenitent is "Lacking remorse."

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 brandish is "to shake or wave menacingly.", the definition for antidote is "Something that relieves or counteracts.", and the definition for comprehensible is "Understandable."

The definition for ethical is "Conforming to accepted standards." Used in a sentence: Mary did the ethical thing and turned in the diamond necklace she found. The definition for brandish is "to shake or wave menacingly.", the definition for clarity is "Clearness.", and the definition for derivative is "Lacking originality."