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 heinous is "shockingly evil.", the definition for supple is "Flexible.", and the definition for foil is "One that enhances or underscores by contrast."

The definition for curtail is "To make less." Used in a sentence: Doreen decided to curtail her spending after she bounced a check. The definition for surplus is "excess.", the definition for disconcert is "To throw into confusion.", and the definition for lurid is "Causing horror, shocking."

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 placebo is "an inactive substance used in medical testing.", the definition for incongruous is "Not harmonious, incompatible.", and the definition for regurgitate is "To pour out or throw back."

The definition for catastrophic is "Relating to extreme misfortune." Used in a sentence: The effects of the massive hurricane were catastrophic. The definition for fickle is "lacking constancy, changeable.", the definition for advantageous is "Giving an advantage.", and the definition for refurbish is "To brighten or freshen."

The definition for archetypal is "Characteristic of the original model or perfect example." Used in a sentence: Shakespeare's sonnets are considered archetypal love poems The definition for pathos is "sympathetic pity.", the definition for stifle is "To repress or discourage.", and the definition for trove is "Valuable collection."