The definition for preclude is "To rule out in advance." Used in a sentence: "Having cake now will preclude dessert later," said Amber's mother. The definition for entangle is "to involve in trouble.", the definition for placebo is "An inactive substance used in medical testing.", and the definition for aerate is "To supply with air."

The definition for onset is "Beginning." Used in a sentence: Crocuses bloom at the onset of spring, sometimes even before the snow melts. The definition for flourish is "to make bold, sweeping gestures.", the definition for pomp is "Showy display.", and the definition for comparable is "Similar, equivalent."

The definition for implausible is "Unbelievable." Used in a sentence: Claudia's implausible excuse failed to convince her teacher. The definition for extant is "currently existing.", the definition for cunning is "Showing clever insight.", and the definition for derelict is "Abandoned."

The definition for impenitent is "Lacking remorse." Used in a sentence: The impenitent criminal received a harsh penalty, but his remorseful accomplice was released. The definition for augment is "to make greater.", the definition for accentuate is "To emphasize.", and the definition for composed is "Calm."

The definition for serenity is "Calmness." Used in a sentence: The serenity of the glassy sea soothed the sailors after the big storm. The definition for promote is "to contribute to the growth or prosperity of.", the definition for foil is "One that enhances or underscores by contrast.", and the definition for elusive is "Hard to grasp."