楼下

downstairs

down / downwards / below / lower / later / next (week etc) / second (of two parts) / to decline / to go down / to arrive at (a decision, conclusion etc) / measure word to show the frequency of an action

surname Lou

house with more than 1 story / storied building / floor / CL:層|层[ceng2],座[zuo4],棟|栋[dong4]