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 stifle is "to repress or discourage.", the definition for obnoxious is "Highly offensive.", and the definition for revoke is "To cancel by taking back."

The definition for fidelity is "State of being faithful." Used in a sentence: Unlike her fickle friend Benji, May Belle was known for her fidelity. The definition for apathetic is "showing little or no emotion.", the definition for civility is "Politeness.", and the definition for repentant is "Feeling regret."

The definition for stern is "Harsh, severe." Used in a sentence: The stern principal canceled the prom after the seniors played a silly prank. The definition for mediate is "to come between parties in order to reconcile.", the definition for flaunt is "To display showily.", and the definition for aerate is "To supply with air."

The definition for exalt is "To elevate by praise." Used in a sentence: The fireman was publicly exalted for his heroism. The definition for demeanor is "behavior towards others.", the definition for flaw is "An imperfection.", and the definition for redouble is "To make twice as great."

The definition for impenitent is "Lacking remorse." Used in a sentence: The impenitent criminal received a harsh penalty, but his remorseful accomplice was released. The definition for ecstatic is "overwhelmingly emotional.", the definition for commemorate is "To mark by a ceremony.", and the definition for plaudits is "Enthusiastic approval."