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 aesthete is "person having or affecting sensitivity to beauty.", the definition for placebo is "An inactive substance used in medical testing.", and the definition for fickle is "Lacking constancy, changeable."

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 brandish is "to shake or wave menacingly.", the definition for gargantuan is "Gigantic.", and the definition for avian is "Relating to birds."

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 gruff is "rough or stern in manner or speech.", the definition for corroborate is "To support with evidence.", and the definition for censure is "To find fault with."

The definition for untenable is "Not able to be defended." Used in a sentence: Rashid made the untenable statement that George Washington was the second president of the United States. The definition for grandiose is "with an affectation of grandeur.", the definition for scapegoat is "Someone who bears the blame for others.", and the definition for genial is "Sympathetic, friendly."

The definition for archaic is "Characteristic of an earlier time." Used in a sentence: In the world of high fashion, two–year–old shoes are considered positively archaic. The definition for aerate is "to supply with air.", the definition for corrosive is "Bitingly sarcastic.", and the definition for buffer is "Protective barrier."