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 stifle is "to repress or discourage.", the definition for buffer is "Protective barrier.", and the definition for avian is "Relating to birds."

The definition for adversary is "One who opposes or resists." Used in a sentence: Franklin hoped to defeat his adversary in the afternoon's tennis match. The definition for parity is "equality.", the definition for untenable is "Not able to be defended.", and the definition for methodical is "Performed in an orderly manner."

The definition for untenable is "Not able to be defended." Used in a sentence: Rashid made the untenable statement that George Washington was the second president of the United States. The definition for unscrupulous is "lacking principles.", the definition for indecorous is "In bad taste.", and the definition for distortion is "The act of twisting out of shape."

The definition for composed is "Calm." Used in a sentence: Although her stomach was in knots, the actress appeared perfectly composed when she took the stage. The definition for ecstatic is "overwhelmingly emotional.", the definition for proximity is "Closeness.", and the definition for onset is "Beginning."

The definition for condone is "To treat as acceptable." Used in a sentence: Crystal condoned her friend's late arrival because she found it hard to be on time herself. The definition for opportune is "suitable or convenient.", the definition for refurbish is "To brighten or freshen.", and the definition for entangle is "To involve in trouble."