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 benevolent is "kind, helpful.", the definition for melodious is "Having a pleasing melody.", and the definition for stern is "Harsh, severe."

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 surplus is "excess.", the definition for ecstatic is "Overwhelmingly emotional.", and the definition for gruff is "Rough or stern in manner or speech."

The definition for beneficial is "Helpful." Used in a sentence: there is no doubt that eating vegetables is beneficial to one's health. The definition for promote is "to contribute to the growth or prosperity of.", the definition for catastrophic is "Relating to extreme misfortune.", and the definition for belated is "Past the normal or proper time."

The definition for ethical is "Conforming to accepted standards." Used in a sentence: Mary did the ethical thing and turned in the diamond necklace she found. The definition for euphoria is "feeling of great happiness.", the definition for redouble is "To make twice as great.", and the definition for stealth is "The act of moving secretly or unnoticed."

The definition for impenitent is "Lacking remorse." Used in a sentence: The impenitent criminal received a harsh penalty, but his remorseful accomplice was released. The definition for futile is "without purpose, completely ineffective.", the definition for turpitude is "Essential baseness, depravity.", and the definition for heed is "To pay attention to."