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 untenable is "not able to be defended.", the definition for rail is "To scold in harsh language.", and the definition for foil is "One that enhances or underscores by contrast."

The definition for corrective is "Intended to correct." Used in a sentence: The school decided to take corrective measures to prevent truancy. The definition for incidental is "minor.", the definition for methodical is "Performed in an orderly manner.", and the definition for rhapsody is "State of great happiness."

The definition for penurious is "Extrememly stingy." Used in a sentence: Ebenezer Scrooge was most penurious, refusing to give even a penny to charity. The definition for buffoonery is "foolish behavior.", the definition for repel is "To resist, reject.", and the definition for comprehensible is "Understandable."

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 benevolent is "kind, helpful.", the definition for extol is "To praise highly.", and the definition for demean is "To lower status."

The definition for retroactive is "effective as of a prior time or condition." Used in a sentence: The retroactive law made even past infractions punishable. The definition for apathetic is "showing little or no emotion.", the definition for composed is "Calm.", and the definition for regurgitate is "To pour out or throw back."