The definition for regurgitate is "To pour out or throw back." Used in a sentence: The teacher wanted us to examine ideas rather than to regurgitate memorized facts. The definition for fickle is "lacking constancy, changeable.", the definition for indecorous is "In bad taste.", and the definition for punctual is "On time."

The definition for opportune is "Suitable or convenient." Used in a sentence: Quan stepped onto the platform at the most opportune time, just as the train pulled in. The definition for curtail is "to make less.", the definition for iridescent is "Having a lustrous or attractivve quality.", and the definition for foil is "One that enhances or underscores by contrast."

The definition for stealth is "The act of moving secretly or unnoticed." Used in a sentence: The burglar took the ring by stealth, slipping it from the sleeping woman's finger. The definition for serenity is "calmness.", the definition for demean is "To lower status.", and the definition for flagrant is "Noticeably offensive."

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 drub is "to defeat decisively.", the definition for inviolable is "Secure from assault of trespass.", and the definition for avian is "Relating to birds."

The definition for retroactive is "effective as of a prior time or condition." Used in a sentence: The retroactive law made even past infractions punishable. The definition for heinous is "shockingly evil.", the definition for anthology is "A collection of selected literary pieces.", and the definition for egotist is "Self–important person."