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 negate is "to make invalid.", the definition for censure is "To find fault with.", and the definition for servile is "Fearfully submissive."

The definition for revoke is "To cancel by taking back." Used in a sentence: After Kal's father revoked his allowance, he had no money for the movies. The definition for melodious is "having a pleasing melody.", the definition for composed is "Calm.", and the definition for manifest is "Obvious."

The definition for incisive is "Impressively direct and decisive." Used in a sentence: Samir's incisive leadership made him the natural choice for president of the company. The definition for servile is "fearfully submissive.", the definition for extol is "To praise highly.", and the definition for stifle is "To repress or discourage."

The definition for obnoxious is "Highly offensive." Used in a sentence: The manager asked the obnoxious diner to leave the restaurant. The definition for exasperation is "the state of being irritated.", the definition for scapegoat is "Someone who bears the blame for others.", and the definition for censure is "To find fault with."

The definition for elate is "To fill with joy." Used in a sentence: It elated Margaret to be awarded first place in the science fair. The definition for proximity is "closeness.", the definition for camaraderie is "Spirit of friendship.", and the definition for preclude is "To rule out in advance."