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 induce is "to influence or cause.", the definition for polarize is "To break up into opposing groups.", and the definition for duplicity is "Deceptive thought, speech, or action."

The definition for commemorate is "To mark by a ceremony." Used in a sentence: Each year, the Franklins commemorate their anniversary by visiting the site of their first date. The definition for lurid is "causing horror, shocking.", the definition for corrective is "Intended to correct.", and the definition for adversary is "One who opposes or resists."

The definition for raucous is "Noisy, rowdy." Used in a sentence: Serena, who preferred quiet conversation, left the rancous party. The definition for pantomime is "telling a story through gestures.", the definition for extant is "Currently existing.", and the definition for advantageous is "Giving an advantage."

The definition for advantageous is "Giving an advantage." Used in a sentence: The house's location in the best school district was advantageous to the seller. The definition for disconcert is "to throw into confusion.", the definition for garish is "Offensively bright.", and the definition for untenable is "Not able to be defended."

The definition for placebo is "An inactive substance used in medical testing." Used in a sentence: Tom, who had taken the placebo, found that his allergy symptoms did not go away. The definition for promote is "to contribute to the growth or prosperity of.", the definition for untenable is "Not able to be defended.", and the definition for onset is "Beginning."