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 untenable is "not able to be defended.", the definition for iridescent is "Having a lustrous or attractivve quality.", and the definition for implement is "To carry out or accomplish."

The definition for buffer is "Protective barrier." Used in a sentence: The dense trees acted as a buffer against the heavy rain. The definition for benefactor is "one who offers financial help.", the definition for insolence is "Boldness or rudeness.", and the definition for stifle is "To repress or discourage."

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 induce is "to influence or cause.", the definition for rhapsody is "State of great happiness.", and the definition for catastrophic is "Relating to extreme misfortune."

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 fragile is "delicate.", the definition for insolence is "Boldness or rudeness.", and the definition for comparable is "Similar, equivalent."

The definition for inauspicious is "Not favorable." Used in a sentence: Gary believed the black foreboding sky was an inauspicious sign. The definition for implement is "to carry out or accomplish.", the definition for archetypal is "Characteristic of the original model or perfect example.", and the definition for pathos is "Sympathetic pity."