The definition for illuminate is "To make clear." Used in a sentence: Her excellent lecture illuminated the complicated subject of nuclear physics. The definition for retroactive is "effective as of a prior time or condition.", the definition for epistolary is "Contained or carried on in letters.", and the definition for stealth is "The act of moving secretly or unnoticed."

The definition for finite is "Having definite limits." Used in a sentence: The exasperated mother had finite patience for her toddler's tantrums. The definition for buffoonery is "foolish behavior.", the definition for accentuate is "To emphasize.", and the definition for civility is "Politeness."

The definition for discern is "To recognize as separate as distinct." Used in a sentence: The pastry connoisseur was able to discern Swiss from Belgian chocolate. The definition for euphoria is "feeling of great happiness.", the definition for brandish is "To shake or wave menacingly.", and the definition for clarity is "Clearness."

The definition for regale is "To amuse." Used in a sentence: My clever brother Jeffrey regaled the dinner guests with tales of his adventures. The definition for oblivious is "lacking awareness.", the definition for immoderate is "Beyond usual or proper limits.", and the definition for comparable is "Similar, equivalent."

The definition for augment is "To make greater." Used in a sentence: Wanda read the dictionary every night to augment her vocabulary. The definition for ramble is "to wander, physically or in language.", the definition for turmoil is "Extreme confusion, agitation.", and the definition for pretentious is "Making unjustified claims."