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 penurious is "extrememly stingy.", the definition for pallid is "Lacking color.", and the definition for futile is "Without purpose, completely ineffective."

The definition for incumbent is "Necessary as a duty or responsibility." Used in a sentence: It was incumbent on Jack to attend his father's retirement party. The definition for accommodate is "to give consideration to.", the definition for oblivious is "Lacking awareness.", and the definition for discern is "To recognize as separate as distinct."

The definition for discern is "To recognize as separate as distinct." Used in a sentence: The pastry connoisseur was able to discern Swiss from Belgian chocolate. The definition for immoderate is "beyond usual or proper limits.", the definition for condone is "To treat as acceptable.", and the definition for salvage is "To save from ruin."

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 incisive is "impressively direct and decisive.", the definition for apathetic is "Showing little or no emotion.", and the definition for pathos is "Sympathetic pity."

The definition for exception is "A case to which the rule does not apply." Used in a sentence: The teacher made an exception and let Gina eat her snack in class. The definition for scamper is "to run quickly.", the definition for heed is "To pay attention to.", and the definition for cunning is "Showing clever insight."