bellow - For a person or animal to emit a deep loud shout or roar, usually in pain or anger.
When Joan entered the office an hour late the third time this week, her manager Mr. Fass bellowed that if she wanted to keep her job, she should consider coming on time from now on.
astute - Ability to understand things quickly and clearly, and to use the knowledge well
From a very early age, Gail instinctively knew everything about business, and and after college she proved to be an astute business woman, and became a millionaire before the age of 30.
