The definition for periodic is "Occurring at regular intervals." Used in a sentence: The periodic innterruptions of the cuckoo clock prevented Li from concentrating. The definition for revoke is "to cancel by taking back.", the definition for rancorous is "Marked by deep ill–will.", and the definition for extenuating is "Partially excusing."

The definition for sociable is "Inclined to seek companionship." Used in a sentence: The sociable Glenda was delighted to receive the party invitation. The definition for prudent is "marked by wisdom, shrewd.", the definition for frugal is "Thrifty, cheap.", and the definition for untenable is "Not able to be defended."

The definition for refurbish is "To brighten or freshen." Used in a sentence: Leeanne cleaned and mended all weekend to refurbish the shabby apartment. The definition for flaw is "an imperfection.", the definition for heinous is "Shockingly evil.", and the definition for flourish is "To make bold, sweeping gestures."

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 flaunt is "to display showily.", the definition for egotist is "Self–important person.", and the definition for facade is "false or superficial appearance."

The definition for inviolable is "Secure from assault of trespass." Used in a sentence: Situated on a mountain, with sixteen–foot walls, the castle was inviolable. The definition for mundane is "practical, ordinary.", the definition for prudent is "Marked by wisdom, shrewd.", and the definition for rehash is "To discuss again."