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 rancorous is "marked by deep ill–will.", the definition for straddle is "To favor opposing sides.", and the definition for proximity is "Closeness."

The definition for grandiose is "With an affectation of grandeur." Used in a sentence: The sweeping, grandiose staircase looked preposterous in the modest entry hall. The definition for iridescent is "having a lustrous or attractivve quality.", the definition for stifle is "To repress or discourage.", and the definition for polarize is "To break up into opposing groups."

The definition for melodious is "Having a pleasing melody." Used in a sentence: The melodious sounds of the symphony soothed Tim after his trying day. The definition for aerate is "to supply with air.", the definition for turmoil is "Extreme confusion, agitation.", and the definition for diffident is "Lacking self–confidence."

The definition for fickle is "Lacking constancy, changeable." Used in a sentence: The fickle Senji had a new best friend every month. The definition for regale is "to amuse.", the definition for parity is "Equality.", and the definition for sociable is "Inclined to seek companionship."

The definition for proximity is "Closeness." Used in a sentence: The proximity of Tia's house to school meant that she could walk there in five minutes. The definition for eloquent is "fluent, expressive.", the definition for beneficial is "Helpful.", and the definition for authoritarian is "Favoring absolute obedience to authority."