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 foil is "one that enhances or underscores by contrast.", the definition for supple is "Flexible.", and the definition for melee is "A tumultuous fight among several people."

The definition for combative is "Eager to fight." Used in a sentence: The teacher suggested the combative student channel his aggression into boxing. The definition for raucous is "noisy, rowdy.", the definition for drab is "Dull, monotonous.", and the definition for pallid is "Lacking color."

The definition for iridescent is "Having a lustrous or attractivve quality." Used in a sentence: The movie star's iridescent presence charmed even the hardened reporter. The definition for foil is "one that enhances or underscores by contrast.", the definition for heinous is "Shockingly evil.", and the definition for disconcert is "To throw into confusion."

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 buffer is "protective barrier.", the definition for placebo is "An inactive substance used in medical testing.", and the definition for avian is "Relating to birds."

The definition for supple is "Flexible." Used in a sentence: The supple leather coat draped like soft cloth around her shoulders. The definition for surplus is "excess.", the definition for beneficial is "Helpful.", and the definition for derelict is "Abandoned."