The definition for combustion is "Act of burning." Used in a sentence: Campers must use fire with great caution to prevent combustion of the parched brush. The definition for opportune is "suitable or convenient.", the definition for prominence is "Importance.", and the definition for comprehensible is "Understandable."

The definition for elate is "To fill with joy." Used in a sentence: It elated Margaret to be awarded first place in the science fair. The definition for entangle is "to involve in trouble.", the definition for accentuate is "To emphasize.", and the definition for placebo is "An inactive substance used in medical testing."

The definition for corrosive is "Bitingly sarcastic." Used in a sentence: The cruel Estella's corrosive comments made Pip cry. The definition for diffident is "lacking self–confidence.", the definition for foil is "One that enhances or underscores by contrast.", and the definition for benefactor is "One who offers financial help."

The definition for derelict is "Abandoned." Used in a sentence: The derelict house was condemned as a public hazard. The definition for impenitent is "lacking remorse.", the definition for elusive is "Hard to grasp.", and the definition for curtail is "To make less."

The definition for catastrophic is "Relating to extreme misfortune." Used in a sentence: The effects of the massive hurricane were catastrophic. The definition for facade is "false or superficial appearance.", the definition for abate is "Become less in amount or intensity.", and the definition for inauspicious is "Not favorable."