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 placebo is "an inactive substance used in medical testing.", the definition for dubious is "Questionable.", and the definition for exasperation is "The state of being irritated."

The definition for euphoria is "Feeling of great happiness." Used in a sentence: Cassandra was overcome with euphoria when she met her long–lost sister. The definition for accentuate is "to emphasize.", the definition for incidental is "Minor.", and the definition for stern is "Harsh, severe."

The definition for opportune is "Suitable or convenient." Used in a sentence: Quan stepped onto the platform at the most opportune time, just as the train pulled in. The definition for moderate is "tending toward the average.", the definition for stern is "Harsh, severe.", and the definition for mundane is "Practical, ordinary."

The definition for redouble is "To make twice as great." Used in a sentence: As the sun began to set, Brittany redoubled her effort to find the necklace she had dropped in the field. The definition for hedonism is "belief that pleasure is the sole aim of life.", the definition for indecorous is "In bad taste.", and the definition for disdain is "Feeling of contempt."

The definition for mandate is "An official order or commission to do something." Used in a sentence: Martha reluctantly obeyed the mandate to vacate her apartment. The definition for fraud is "trick.", the definition for revive is "To bring back to life.", and the definition for impenitent is "Lacking remorse."