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 intricate is "having complex and interrelated parts.", the definition for demean is "To lower status.", and the definition for regale is "To amuse."

The definition for comparable is "Similar, equivalent." Used in a sentence: Helen will only accept something of comparable value for her ticket to the concert. The definition for heinous is "shockingly evil.", the definition for opportune is "Suitable or convenient.", and the definition for inflammatory is "Tending to excite anger."

The definition for periodic is "Occurring at regular intervals." Used in a sentence: The periodic innterruptions of the cuckoo clock prevented Li from concentrating. The definition for flourish is "to make bold, sweeping gestures.", the definition for implausible is "Unbelievable.", and the definition for euphoria is "Feeling of great happiness."

The definition for onset is "Beginning." Used in a sentence: Crocuses bloom at the onset of spring, sometimes even before the snow melts. The definition for corrosive is "bitingly sarcastic.", the definition for servile is "Fearfully submissive.", and the definition for stealth is "The act of moving secretly or unnoticed."

The definition for accentuate is "To emphasize." Used in a sentence: Carla used red ribbons to accentuate the coppery tones in her hair. The definition for melee is "a tumultuous fight among several people.", the definition for celebrated is "Widely known, respected.", and the definition for inauspicious is "Not favorable."