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 implausible is "unbelievable.", the definition for punctual is "On time.", and the definition for straddle is "To favor opposing sides."

The definition for moderate is "Tending toward the average." Used in a sentence: The best–selling writer was disappointed; his new novel was only a moderate success. The definition for curtail is "to make less.", the definition for defiant is "Showing bold resistance.", and the definition for benefactor is "One who offers financial help."

The definition for diffident is "Lacking self–confidence." Used in a sentence: The diffident student never raised her hand in class, even when she knew the answer. The definition for fickle is "lacking constancy, changeable.", the definition for straddle is "To favor opposing sides.", and the definition for disdain is "Feeling of contempt."

The definition for frugal is "Thrifty, cheap." Used in a sentence: The frugal shopper only bought items that were on sale. The definition for raucous is "noisy, rowdy.", the definition for revive is "To bring back to life.", and the definition for avian is "Relating to birds."

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 insolence is "boldness or rudeness.", the definition for stealth is "The act of moving secretly or unnoticed.", and the definition for mandate is "An official order or commission to do something."