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 naive is "lacking worldy wisdom.", the definition for penurious is "Extrememly stingy.", and the definition for corroborate is "To support with evidence."

The definition for implausible is "Unbelievable." Used in a sentence: Claudia's implausible excuse failed to convince her teacher. The definition for prudent is "marked by wisdom, shrewd.", the definition for curtail is "To make less.", and the definition for melodious is "Having a pleasing melody."

The definition for augment is "To make greater." Used in a sentence: Wanda read the dictionary every night to augment her vocabulary. The definition for deferment is "the act of delaying.", the definition for clarity is "Clearness.", and the definition for turpitude is "Essential baseness, depravity."

The definition for elusive is "Hard to grasp." Used in a sentence: The words to the song are elusive, as the singer tends to mumble. The definition for fickle is "lacking constancy, changeable.", the definition for beneficial is "Helpful.", and the definition for turmoil is "Extreme confusion, agitation."

The definition for comprehensible is "Understandable." Used in a sentence: Shannon spoke slowly so her directions would be comprehensible to her foreign visitor. The definition for mediate is "to come between parties in order to reconcile.", the definition for corrosive is "Bitingly sarcastic.", and the definition for derivative is "Lacking originality."