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 incongruous is "not harmonious, incompatible.", the definition for corroborate is "To support with evidence.", and the definition for entangle is "To involve in trouble."

The definition for distortion is "The act of twisting out of shape." Used in a sentence: The story about the actress in the gossip column was a distortion of the truth. The definition for dubious is "questionable.", the definition for fickle is "Lacking constancy, changeable.", and the definition for curtail is "To make less."

The definition for regale is "To amuse." Used in a sentence: My clever brother Jeffrey regaled the dinner guests with tales of his adventures. The definition for buffer is "protective barrier.", the definition for derivative is "Lacking originality.", and the definition for perception is "Capacity for seeing or understanding."

The definition for inviolable is "Secure from assault of trespass." Used in a sentence: Situated on a mountain, with sixteen–foot walls, the castle was inviolable. The definition for appraise is "to evaluate the worth of.", the definition for exalt is "To elevate by praise.", and the definition for genial is "Sympathetic, friendly."

The definition for polarize is "To break up into opposing groups." Used in a sentence: Thelma tended to polarize discussions rather than to encourage compromise. The definition for mediate is "to come between parties in order to reconcile.", the definition for civility is "Politeness.", and the definition for drab is "Dull, monotonous."