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 aerate is "to supply with air.", the definition for stealth is "The act of moving secretly or unnoticed.", and the definition for insinuate is "To suggest indirectly."

The definition for surplus is "Excess." Used in a sentence: Trevor decided to freeze the surplus chili for next week's tailgate party. The definition for fidelity is "state of being faithful.", the definition for combustion is "Act of burning.", and the definition for accentuate is "To emphasize."

The definition for methodical is "Performed in an orderly manner." Used in a sentence: Oscar's methodical approach exasperated his free–spirited friend Ben. The definition for authoritarian is "favoring absolute obedience to authority.", the definition for accommodate is "To give consideration to.", and the definition for belated is "Past the normal or proper time."

The definition for clarity is "Clearness." Used in a sentence: The refreshing water in the mountain stream was remarkable for its clarity. The definition for incumbent is "necessary as a duty or responsibility.", the definition for iridescent is "Having a lustrous or attractivve quality.", and the definition for prominence is "Importance."

The definition for catastrophic is "Relating to extreme misfortune." Used in a sentence: The effects of the massive hurricane were catastrophic. The definition for entangle is "to involve in trouble.", the definition for ramble is "To wander, physically or in language.", and the definition for avian is "Relating to birds."