The definition for catastrophic is "Relating to extreme misfortune." Used in a sentence: The effects of the massive hurricane were catastrophic. The definition for flagrant is "noticeably offensive.", the definition for dubious is "Questionable.", and the definition for impenitent is "Lacking remorse."

The definition for oblivious is "Lacking awareness." Used in a sentence: Love–struck Charlie was oblivious to everyone but the object of his affection. The definition for appraise is "to evaluate the worth of.", the definition for ethical is "Conforming to accepted standards.", and the definition for drab is "Dull, monotonous."

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 corrosive is "bitingly sarcastic.", the definition for meticulous is "Extrememly careful regarding details.", and the definition for sociable is "Inclined to seek companionship."

The definition for extant is "Currently existing." Used in a sentence: Some consider Clint Eastwood the greatest extant American director. The definition for induce is "to influence or cause.", the definition for precept is "A general rule of action.", and the definition for revoke is "To cancel by taking back."

The definition for procrastinate is "To put off intentionally." Used in a sentence: Yvonne's father urged, "Don't procrastinate. Clean your room right away." The definition for inauspicious is "not favorable.", the definition for corrosive is "Bitingly sarcastic.", and the definition for regale is "To amuse."