Aerodynamic is a term used to describe the shape of an object that allows it to move through air or water with minimal resistance. The crossword solutions for this term include 'SLEEK' (5 letters), 'STREAMLINED' (11 letters), 'DRAG' (4 letters), 'sleeker' (7 letters), 'sleekest' (8 letters), and 'BIER' (4 letters). SLEEK, STREAMLINED, and sleekest all refer to the smooth, curved shape of an object that reduces DRAG and increases speed. DRAG is the force that resists the motion of an object through air or water. BIER is a German word meaning 'BEAM, ' which is a structural support that can also be used to describe the shape of an object.