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 frugal is "thrifty, cheap.", the definition for ploy is "A contrived plan.", and the definition for duplicity is "Deceptive thought, speech, or action."

The definition for revoke is "To cancel by taking back." Used in a sentence: After Kal's father revoked his allowance, he had no money for the movies. The definition for derivative is "lacking originality.", the definition for benevolent is "Kind, helpful.", and the definition for aesthete is "Person having or affecting sensitivity to beauty."

The definition for aerate is "To supply with air." Used in a sentence: Every spring, Soloman used his tiller to aerate the compact soil. The definition for melodious is "having a pleasing melody.", the definition for comprehensible is "Understandable.", and the definition for adversary is "One who opposes or resists."

The definition for corrective is "Intended to correct." Used in a sentence: The school decided to take corrective measures to prevent truancy. The definition for brandish is "to shake or wave menacingly.", the definition for appraise is "To evaluate the worth of.", and the definition for repel is "To resist, reject."

The definition for unscrupulous is "Lacking principles." Used in a sentence: The unscrupulous salesman was fired for lying to his customers. 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 celebrated is "Widely known, respected.", and the definition for benefactor is "One who offers financial help."