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 dubious is "questionable.", the definition for aesthete is "Person having or affecting sensitivity to beauty.", and the definition for intricate is "Having complex and interrelated parts."

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 stern is "harsh, severe.", the definition for servile is "Fearfully submissive.", and the definition for regurgitate is "To pour out or throw back."

The definition for repel is "To resist, reject." Used in a sentence: The soldiers made a massive charge to repel the invaders. The definition for trove is "valuable collection.", the definition for commemorate is "To mark by a ceremony.", and the definition for frugal is "Thrifty, cheap."

The definition for negate is "To make invalid." Used in a sentence: Paula negated Tiffany's argument by proving that her main premise was false. The definition for incisive is "impressively direct and decisive.", the definition for servile is "Fearfully submissive.", and the definition for untenable is "Not able to be defended."

The definition for heinous is "Shockingly evil." Used in a sentence: Eduardo's heinous betrayal of Lydia shocked even Latasha, who knew his evil ways. The definition for lurid is "causing horror, shocking.", the definition for duplicity is "Deceptive thought, speech, or action.", and the definition for indecorous is "In bad taste."