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 ecstatic is "overwhelmingly emotional.", the definition for heed is "To pay attention to.", and the definition for rehash is "To discuss again."

The definition for defiant is "Showing bold resistance." Used in a sentence: The defiant toddler refused to leave the park. The definition for compulsion is "an irresistible impulse.", the definition for appraise is "To evaluate the worth of.", and the definition for intricate is "Having complex and interrelated parts."

The definition for revive is "To bring back to life." Used in a sentence: Hank tried to revive Clare's interest in the project, but her enthusiasm had expired. The definition for implausible is "unbelievable.", the definition for serenity is "Calmness.", and the definition for civility is "Politeness."

The definition for ethical is "Conforming to accepted standards." Used in a sentence: Mary did the ethical thing and turned in the diamond necklace she found. The definition for rail is "to scold in harsh language.", the definition for surplus is "Excess.", and the definition for combustion is "Act of burning."

The definition for penurious is "Extrememly stingy." Used in a sentence: Ebenezer Scrooge was most penurious, refusing to give even a penny to charity. The definition for eulogy is "speech or writing in praise of deceased.", the definition for augment is "To make greater.", and the definition for incidental is "Minor."