The definition for elate is "To fill with joy." Used in a sentence: It elated Margaret to be awarded first place in the science fair. The definition for indecorous is "in bad taste.", the definition for combustion is "Act of burning.", and the definition for inauspicious is "Not favorable."

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 benefactor is "one who offers financial help.", the definition for mediate is "To come between parties in order to reconcile.", and the definition for repentant is "Feeling regret."

The definition for negate is "To make invalid." Used in a sentence: Paula negated Tiffany's argument by proving that her main premise was false. The definition for finite is "having definite limits.", the definition for egotist is "Self–important person.", and the definition for obnoxious is "Highly offensive."

The definition for beneficial is "Helpful." Used in a sentence: there is no doubt that eating vegetables is beneficial to one's health. The definition for ecstatic is "overwhelmingly emotional.", the definition for supple is "Flexible.", and the definition for extol is "To praise highly."

The definition for buffer is "Protective barrier." Used in a sentence: The dense trees acted as a buffer against the heavy rain. The definition for corrosive is "bitingly sarcastic.", the definition for abate is "Become less in amount or intensity.", and the definition for procrastinate is "To put off intentionally."