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 combustion is "act of burning.", the definition for elusive is "Hard to grasp.", and the definition for epistolary is "Contained or carried on in letters."

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 conduit is "means for transmitting or distributing.", the definition for facade is "false or superficial appearance.", and the definition for advantageous is "Giving an advantage."

The definition for commemorate is "To mark by a ceremony." Used in a sentence: Each year, the Franklins commemorate their anniversary by visiting the site of their first date. The definition for stern is "harsh, severe.", the definition for benefactor is "One who offers financial help.", and the definition for abate is "Become less in amount or intensity."

The definition for civility is "Politeness." Used in a sentence: The usually unruly Thomas acted with great civility when his favorite uncle visited. The definition for derelict is "abandoned.", the definition for authoritarian is "Favoring absolute obedience to authority.", and the definition for aerate is "To supply with air."

The definition for aerate is "To supply with air." Used in a sentence: Every spring, Soloman used his tiller to aerate the compact soil. The definition for iridescent is "having a lustrous or attractivve quality.", the definition for archetypal is "Characteristic of the original model or perfect example.", and the definition for colossal is "Immense, enormous."