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 onset is "beginning.", the definition for elusive is "Hard to grasp.", and the definition for procrastinate is "To put off intentionally."

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 gruff is "rough or stern in manner or speech.", the definition for curtail is "To make less.", and the definition for punctual is "On time."

The definition for unscrupulous is "Lacking principles." Used in a sentence: The unscrupulous salesman was fired for lying to his customers. The definition for archaic is "characteristic of an earlier time.", the definition for indecorous is "In bad taste.", and the definition for rail is "To scold in harsh language."

The definition for parity is "Equality." Used in a sentence: Hilda, to avoid squabbles, aimed for parity in the slices of birthday cake. The definition for mediate is "to come between parties in order to reconcile.", the definition for fickle is "Lacking constancy, changeable.", and the definition for fidelity is "State of being faithful."

The definition for incidental is "Minor." Used in a sentence: The accountant advised Justine not to report her incidental expenses. The definition for appalling is "inspiring dismay or disgust.", the definition for equitable is "Fair and equal.", and the definition for revive is "To bring back to life."