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 redouble is "to make twice as great.", the definition for straddle is "To favor opposing sides.", and the definition for rhapsody is "State of great happiness."

The definition for foil is "One that enhances or underscores by contrast." Used in a sentence: The sweet cookie was a perfect foil to the sour lemon sorbet. The definition for derivative is "lacking originality.", the definition for ramble is "To wander, physically or in language.", and the definition for catastrophic is "Relating to extreme misfortune."

The definition for exalt is "To elevate by praise." Used in a sentence: The fireman was publicly exalted for his heroism. The definition for comparable is "similar, equivalent.", the definition for raspy is "rough, grating.", and the definition for derelict is "Abandoned."

The definition for gravity is "Importance, significance." Used in a sentence: Understanding the gravity of his error, Ken offered his humblest apology. The definition for epistolary is "contained or carried on in letters.", the definition for derivative is "Lacking originality.", and the definition for mundane is "Practical, ordinary."

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 regurgitate is "to pour out or throw back.", the definition for moderate is "Tending toward the average.", and the definition for drub is "To defeat decisively."