The definition for serenity is "Calmness." Used in a sentence: The serenity of the glassy sea soothed the sailors after the big storm. The definition for impenitent is "lacking remorse.", the definition for interminable is "Never ending, or seemingly endless.", and the definition for colossal is "Immense, enormous."

The definition for demeanor is "Behavior towards others." Used in a sentence: Carlos was well liked because of his charming demeanor. The definition for placebo is "an inactive substance used in medical testing.", the definition for flagrant is "Noticeably offensive.", and the definition for retroactive is "effective as of a prior time or condition."

The definition for opportune is "Suitable or convenient." Used in a sentence: Quan stepped onto the platform at the most opportune time, just as the train pulled in. The definition for grandiose is "with an affectation of grandeur.", the definition for distortion is "The act of twisting out of shape.", and the definition for antidote is "Something that relieves or counteracts."

The definition for euphoria is "Feeling of great happiness." Used in a sentence: Cassandra was overcome with euphoria when she met her long–lost sister. The definition for prune is "to reduce by removing excess.", the definition for entangle is "To involve in trouble.", and the definition for incongruous is "Not harmonious, incompatible."

The definition for exalt is "To elevate by praise." Used in a sentence: The fireman was publicly exalted for his heroism. The definition for heed is "to pay attention to.", the definition for rail is "To scold in harsh language.", and the definition for censure is "To find fault with."