The definition for combustion is "Act of burning." Used in a sentence: Campers must use fire with great caution to prevent combustion of the parched brush. The definition for moderate is "tending toward the average.", the definition for promote is "To contribute to the growth or prosperity of.", and the definition for ethical is "Conforming to accepted standards."

The definition for stern is "Harsh, severe." Used in a sentence: The stern principal canceled the prom after the seniors played a silly prank. The definition for polarize is "to break up into opposing groups.", the definition for buffoonery is "Foolish behavior.", and the definition for epitaph is "Brief statement honoring a dead person."

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 manifest is "obvious.", the definition for egotist is "Self–important person.", and the definition for heed is "To pay attention to."

The definition for disdain is "Feeling of contempt." Used in a sentence: The arrogant writer did not hide his disdain for his uneducated dinner companion. The definition for raspy is "rough, grating.", the definition for drab is "Dull, monotonous.", and the definition for nurture is "To further the development of."

The definition for archaic is "Characteristic of an earlier time." Used in a sentence: In the world of high fashion, two–year–old shoes are considered positively archaic. The definition for iridescent is "having a lustrous or attractivve quality.", the definition for ramble is "To wander, physically or in language.", and the definition for colossal is "Immense, enormous."