The definition for periodic is "Occurring at regular intervals." Used in a sentence: The periodic innterruptions of the cuckoo clock prevented Li from concentrating. The definition for facade is "false or superficial appearance.", the definition for demean is "To lower status.", and the definition for rancorous is "Marked by deep ill–will."

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 rail is "to scold in harsh language.", the definition for foil is "One that enhances or underscores by contrast.", and the definition for elusive is "Hard to grasp."

The definition for awe is "Emotion combining dread and wonder." Used in a sentence: Charlie was in awe of his uncle, a professional football player and chess champion. The definition for gruff is "rough or stern in manner or speech.", the definition for facade is "false or superficial appearance.", and the definition for lurid is "Causing horror, shocking."

The definition for elusive is "Hard to grasp." Used in a sentence: The words to the song are elusive, as the singer tends to mumble. The definition for appalling is "inspiring dismay or disgust.", the definition for colossal is "Immense, enormous.", and the definition for periodic is "Occurring at regular intervals."

The definition for disconcert is "To throw into confusion." Used in a sentence: Jennifer's outspoken criticism of the meal disoncerted the waiter. The definition for clairvoyance is "ability to see things beyond ordinary perception.", the definition for celebrated is "Widely known, respected.", and the definition for negate is "To make invalid."