The term ASSISTANT ARCTIC can be broken down into three crossword solutions: BERG (4 letters), POLAR (5 letters), and AUK (3 letters). BERG is a German word meaning mountain or hill, and is often used to refer to the large masses of ice found in the Arctic. POLAR refers to the North and South Poles, which are located in the Arctic region. Finally, AUK is a type of seabird that is native to the Arctic region.