The definition for stifle is "To repress or discourage." Used in a sentence: Amy tried ineffectively to stifle her giggles after she read Susan's note in class. The definition for fickle is "lacking constancy, changeable.", the definition for placebo is "An inactive substance used in medical testing.", and the definition for eulogy is "Speech or writing in praise of deceased."

The definition for comprehensible is "Understandable." Used in a sentence: Shannon spoke slowly so her directions would be comprehensible to her foreign visitor. The definition for revoke is "to cancel by taking back.", the definition for penurious is "Extrememly stingy.", and the definition for servile is "Fearfully submissive."

The definition for illuminate is "To make clear." Used in a sentence: Her excellent lecture illuminated the complicated subject of nuclear physics. The definition for repel is "to resist, reject.", the definition for moderate is "Tending toward the average.", and the definition for implement is "To carry out or accomplish."

The definition for rancorous is "Marked by deep ill–will." Used in a sentence: The rancorous competition between the two chess clubs actually ended in a brawl. The definition for demeanor is "behavior towards others.", the definition for proximity is "Closeness.", and the definition for trove is "Valuable collection."

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 combustion is "act of burning.", the definition for periodic is "Occurring at regular intervals.", and the definition for indecorous is "In bad taste."