noun a small cavity, pit, or hollow, in particular, a small air sac in the lungs where oxygen and carbon dioxide are exchanged during breathing
noun a rounded projection at the end of a bone, forming an articulation with another bone
noun the top of something, especially a mountain or hill
verb to reach the highest point or level
noun a physical blemish or distortion, typically of the human body
adjective deformed or distorted in shape or appearance
noun the rear end or hind part of something
adjective situated behind or at the rear