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 plaudits is "enthusiastic approval.", the definition for corrosive is "Bitingly sarcastic.", and the definition for periodic is "Occurring at regular intervals."

The definition for futile is "Without purpose, completely ineffective." Used in a sentence: Arguing with Andrew is futile because he never changes his mind. The definition for plaudits is "enthusiastic approval.", the definition for heed is "To pay attention to.", and the definition for ethical is "Conforming to accepted standards."

The definition for liability is "A person or thing whose presence or behavior is likely to cause embarrassment or put one at a disadvantage." Used in a sentence: Kevin's growing fatigue was a liability as he attempted to climb the steep hill. The definition for fidelity is "state of being faithful.", the definition for civility is "Politeness.", and the definition for proximity is "Closeness."

The definition for euphoria is "Feeling of great happiness." Used in a sentence: Cassandra was overcome with euphoria when she met her long–lost sister. The definition for finite is "having definite limits.", the definition for drub is "To defeat decisively.", and the definition for parity is "Equality."

The definition for diffident is "Lacking self–confidence." Used in a sentence: The diffident student never raised her hand in class, even when she knew the answer. The definition for incumbent is "necessary as a duty or responsibility.", the definition for surplus is "Excess.", and the definition for fickle is "Lacking constancy, changeable."