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 derivative is "lacking originality.", the definition for corroborate is "To support with evidence.", and the definition for supple is "Flexible."

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 raspy is "rough, grating.", the definition for mediate is "To come between parties in order to reconcile.", and the definition for appalling is "Inspiring dismay or disgust."

The definition for manifest is "Obvious." Used in a sentence: James finally made his affection manifest when he handed Jessica a red rose. The definition for procrastinate is "to put off intentionally.", the definition for raspy is "rough, grating.", and the definition for naive is "Lacking worldy wisdom."

The definition for advantageous is "Giving an advantage." Used in a sentence: The house's location in the best school district was advantageous to the seller. The definition for incongruous is "not harmonious, incompatible.", the definition for trove is "Valuable collection.", and the definition for cunning is "Showing clever insight."

The definition for ethical is "Conforming to accepted standards." Used in a sentence: Mary did the ethical thing and turned in the diamond necklace she found. The definition for onset is "beginning.", the definition for gravity is "Importance, significance.", and the definition for apathetic is "Showing little or no emotion."