After years of neglect, the building appeared shabby and uninviting.

shabby 是形容词，由动词 shab（磨损、变旧）加上形容词后缀 -by 构成，意思是"破旧的、破败的"。这个词常用来形容因年久失修或缺乏维护而显得破旧不堪的建筑物或物品。