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 egotist is "self–important person.", the definition for adversary is "One who opposes or resists.", and the definition for accentuate is "To emphasize."

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 impenitent is "lacking remorse.", the definition for parity is "Equality.", and the definition for avian is "Relating to birds."

The definition for impenitent is "Lacking remorse." Used in a sentence: The impenitent criminal received a harsh penalty, but his remorseful accomplice was released. The definition for corrective is "intended to correct.", the definition for surplus is "Excess.", and the definition for distortion is "The act of twisting out of shape."

The definition for egotist is "Self–important person." Used in a sentence: Darren dreaded carpooling with the egotist Shelly, who talked about herself nonstop. The definition for placebo is "an inactive substance used in medical testing.", the definition for accommodate is "To give consideration to.", and the definition for liability is "A person or thing whose presence or behavior is likely to cause embarrassment or put one at a disadvantage."

The definition for polarize is "To break up into opposing groups." Used in a sentence: Thelma tended to polarize discussions rather than to encourage compromise. The definition for interminable is "never ending, or seemingly endless.", the definition for servile is "Fearfully submissive.", and the definition for trove is "Valuable collection."