The definition for foil is "One that enhances or underscores by contrast." Used in a sentence: The sweet cookie was a perfect foil to the sour lemon sorbet. The definition for buffer is "protective barrier.", the definition for nurture is "To further the development of.", and the definition for cunning is "Showing clever insight."

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 gravity is "importance, significance.", the definition for incumbent is "Necessary as a duty or responsibility.", and the definition for straddle is "To favor opposing sides."

The definition for egotist is "Self–important person." Used in a sentence: Darren dreaded carpooling with the egotist Shelly, who talked about herself nonstop. The definition for inflammatory is "tending to excite anger.", the definition for pretentious is "Making unjustified claims.", and the definition for comparable is "Similar, equivalent."

The definition for avian is "Relating to birds." Used in a sentence: The old man affectionately referred to pigeons as his "avian friends." The definition for intricate is "having complex and interrelated parts.", the definition for regale is "To amuse.", and the definition for stern is "Harsh, severe."

The definition for exasperation is "The state of being irritated." Used in a sentence: The longer Jorge waited in line at the ticket counter, the more his exasperation grew. The definition for celebrated is "widely known, respected.", the definition for disdain is "Feeling of contempt.", and the definition for extant is "Currently existing."