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 foil is "one that enhances or underscores by contrast.", the definition for aesthete is "Person having or affecting sensitivity to beauty.", and the definition for regale is "To amuse."

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 gargantuan is "gigantic.", the definition for awe is "Emotion combining dread and wonder.", and the definition for cunning is "Showing clever insight."

The definition for preclude is "To rule out in advance." Used in a sentence: "Having cake now will preclude dessert later," said Amber's mother. The definition for stealth is "the act of moving secretly or unnoticed.", the definition for civility is "Politeness.", and the definition for retroactive is "effective as of a prior time or condition."

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 corroborate is "to support with evidence.", the definition for fragile is "Delicate.", and the definition for liability is "A person or thing whose presence or behavior is likely to cause embarrassment or put one at a disadvantage."

The definition for drub is "To defeat decisively." Used in a sentence: The powerful young boxer drubbed the longtime champion. The definition for civility is "politeness.", the definition for facade is "false or superficial appearance.", and the definition for refurbish is "To brighten or freshen."