The definition for extol is "To praise highly." Used in a sentence: The statesman extolled the ambassador who single–handedly negotiated the peace treaty. The definition for corroborate is "to support with evidence.", the definition for periodic is "Occurring at regular intervals.", and the definition for manifest is "Obvious."

The definition for avian is "Relating to birds." Used in a sentence: The old man affectionately referred to pigeons as his "avian friends." The definition for buffer is "protective barrier.", the definition for accommodate is "To give consideration to.", and the definition for curtail is "To make less."

The definition for cunning is "Showing clever insight." Used in a sentence: The general devised a cunning strategy to outfox the enemy. The definition for appraise is "to evaluate the worth of.", the definition for liability is "A person or thing whose presence or behavior is likely to cause embarrassment or put one at a disadvantage.", and the definition for accessible is "Easy to reach or to approach."

The definition for gruff is "Rough or stern in manner or speech." Used in a sentence: Heidi's grandfather was gruff, barking stern orders and hardly smiling. The definition for dubious is "questionable.", the definition for futile is "Without purpose, completely ineffective.", and the definition for demean is "To lower status."

The definition for compulsion is "An irresistible impulse." Used in a sentence: Tamar, a shoe fanatic, could not resist the compulsion to buy the shiny red boots. The definition for archaic is "characteristic of an earlier time.", the definition for corrosive is "Bitingly sarcastic.", and the definition for mandate is "An official order or commission to do something."