◎ 故交,故旧 gùjiāo,gùjiù

[old friends and acquaintances;close friend of many years' standing] 旧友,老朋友,老相识

红颜意气尽,白璧故交轻。——唐· 卢照邻《羁卧山中》

故旧不遗,则民不偷。——《论语·秦伯》(不偷:不薄,厚道)