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 illuminate is "to make clear.", the definition for insolence is "Boldness or rudeness.", and the definition for regurgitate is "To pour out or throw back."

The definition for incumbent is "Necessary as a duty or responsibility." Used in a sentence: It was incumbent on Jack to attend his father's retirement party. The definition for oblivious is "lacking awareness.", the definition for liability is "A person or thing whose presence or behavior is likely to cause embarrassment or put one at a disadvantage.", and the definition for apathetic is "Showing little or no emotion."

The definition for inauspicious is "Not favorable." Used in a sentence: Gary believed the black foreboding sky was an inauspicious sign. The definition for stifle is "to repress or discourage.", the definition for apathetic is "Showing little or no emotion.", and the definition for authoritarian is "Favoring absolute obedience to authority."

The definition for commemorate is "To mark by a ceremony." Used in a sentence: Each year, the Franklins commemorate their anniversary by visiting the site of their first date. The definition for implausible is "unbelievable.", the definition for penurious is "Extrememly stingy.", and the definition for turmoil is "Extreme confusion, agitation."

The definition for serenity is "Calmness." Used in a sentence: The serenity of the glassy sea soothed the sailors after the big storm. The definition for extenuating is "partially excusing.", the definition for oblivious is "Lacking awareness.", and the definition for raspy is "rough, grating."