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 illuminate is "to make clear.", the definition for absolve is "To forgive; to free from guilt.", and the definition for manifest is "Obvious."

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 fragile is "delicate.", the definition for penurious is "Extrememly stingy.", and the definition for flagrant is "Noticeably offensive."

The definition for fickle is "Lacking constancy, changeable." Used in a sentence: The fickle Senji had a new best friend every month. The definition for oblivious is "lacking awareness.", the definition for discern is "To recognize as separate as distinct.", and the definition for incongruous is "Not harmonious, incompatible."

The definition for surplus is "Excess." Used in a sentence: Trevor decided to freeze the surplus chili for next week's tailgate party. The definition for combustion is "act of burning.", the definition for corroborate is "To support with evidence.", and the definition for serenity is "Calmness."

The definition for meticulous is "Extrememly careful regarding details." Used in a sentence: The meticulous detective found every shred of evidence at the crime scene. The definition for frugal is "thrifty, cheap.", the definition for entangle is "To involve in trouble.", and the definition for dubious is "Questionable."