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 diffident is "lacking self–confidence.", the definition for intricate is "Having complex and interrelated parts.", and the definition for extol is "To praise highly."

The definition for pathos is "Sympathetic pity." Used in a sentence: The soldiers cherished the kindly Nurse Nightingale for her pathos. The definition for gruff is "rough or stern in manner or speech.", the definition for derivative is "Lacking originality.", and the definition for combative is "Eager to fight."

The definition for raucous is "Noisy, rowdy." Used in a sentence: Serena, who preferred quiet conversation, left the rancous party. The definition for negate is "to make invalid.", the definition for heed is "To pay attention to.", and the definition for corrosive is "Bitingly sarcastic."

The definition for ploy is "A contrived plan." Used in a sentence: Sarah thought George's ploy of borrowing her notes was a cowardly way to ask her out. The definition for accessible is "easy to reach or to approach.", the definition for repentant is "Feeling regret.", and the definition for refurbish is "To brighten or freshen."

The definition for perception is "Capacity for seeing or understanding." Used in a sentence: His incredible perception made him the best detective on the force. The definition for aesthete is "person having or affecting sensitivity to beauty.", the definition for pathos is "Sympathetic pity.", and the definition for mandate is "An official order or commission to do something."