The definition for catastrophic is "Relating to extreme misfortune." Used in a sentence: The effects of the massive hurricane were catastrophic. The definition for heinous is "shockingly evil.", the definition for advantageous is "Giving an advantage.", and the definition for aerate is "To supply with air."

The definition for facade is "false or superficial appearance." Used in a sentence: Emily's smile is just a facade masking her broken heart. The definition for redouble is "to make twice as great.", the definition for negate is "To make invalid.", and the definition for comparable is "Similar, equivalent."

The definition for fickle is "Lacking constancy, changeable." Used in a sentence: The fickle Senji had a new best friend every month. The definition for opportune is "suitable or convenient.", the definition for moderate is "Tending toward the average.", and the definition for distortion is "The act of twisting out of shape."

The definition for untenable is "Not able to be defended." Used in a sentence: Rashid made the untenable statement that George Washington was the second president of the United States. The definition for appraise is "to evaluate the worth of.", the definition for pretentious is "Making unjustified claims.", and the definition for heinous is "Shockingly evil."

The definition for combative is "Eager to fight." Used in a sentence: The teacher suggested the combative student channel his aggression into boxing. The definition for diffident is "lacking self–confidence.", the definition for regurgitate is "To pour out or throw back.", and the definition for accommodate is "To give consideration to."