阝 is the combining form of two distinct radicals, distinguished by whether it is on the left or right of a character. 阜 (fù) as left radical means "Hill"; 邑 (yì) as right radical means "city". For instance: 鄙, remote city; 郭, city and walls; 都, the city with ancestral temple of emperors; 阻, obstruction.
那 邮 邻 郊 部 都 队 阳 阴 阿 附 际 降 院 除 险 陪 随