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 facade is "false or superficial appearance.", the definition for ethical is "Conforming to accepted standards.", and the definition for apathetic is "Showing little or no emotion."

The definition for futile is "Without purpose, completely ineffective." Used in a sentence: Arguing with Andrew is futile because he never changes his mind. The definition for euphoria is "feeling of great happiness.", the definition for repentant is "Feeling regret.", and the definition for regale is "To amuse."

The definition for curtail is "To make less." Used in a sentence: Doreen decided to curtail her spending after she bounced a check. The definition for repentant is "feeling regret.", the definition for grandiose is "With an affectation of grandeur.", and the definition for lurid is "Causing horror, shocking."

The definition for benevolent is "Kind, helpful." Used in a sentence: Sherman revealed his benevolent side when he offered to help Carter with his homework. The definition for sociable is "inclined to seek companionship.", the definition for extenuating is "Partially excusing.", and the definition for placebo is "An inactive substance used in medical testing."

The definition for exasperation is "The state of being irritated." Used in a sentence: The longer Jorge waited in line at the ticket counter, the more his exasperation grew. The definition for anthology is "a collection of selected literary pieces.", the definition for extant is "Currently existing.", and the definition for prune is "To reduce by removing excess."