The definition for placebo is "An inactive substance used in medical testing." Used in a sentence: Tom, who had taken the placebo, found that his allergy symptoms did not go away. The definition for civility is "politeness.", the definition for garish is "Offensively bright.", and the definition for demean is "To lower status."

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 condone is "to treat as acceptable.", the definition for celebrated is "Widely known, respected.", and the definition for defiant is "Showing bold resistance."

The definition for incongruous is "Not harmonious, incompatible." Used in a sentence: Sadie's cowboy hat was incongruous with her black cocktail dress. The definition for euphoria is "feeling of great happiness.", the definition for revoke is "To cancel by taking back.", and the definition for lenient is "Mild or tolerant."

The definition for regurgitate is "To pour out or throw back." Used in a sentence: The teacher wanted us to examine ideas rather than to regurgitate memorized facts. The definition for prune is "to reduce by removing excess.", the definition for combative is "Eager to fight.", and the definition for aerate is "To supply with air."

The definition for fickle is "Lacking constancy, changeable." Used in a sentence: The fickle Senji had a new best friend every month. The definition for frugal is "thrifty, cheap.", the definition for rancorous is "Marked by deep ill–will.", and the definition for interminable is "Never ending, or seemingly endless."