離群索居（離羣索居）　

◎ 離群索居 líqún-suǒjū

(1) [live in solitude; keep oneself to oneself; live out of the world;live alone; live within oneself; plough a lonely furrow] 索居:單獨(dú)居住。離開(kāi)朋友獨(dú)自生活

學(xué)者離群索居,各為異說(shuō)。——《隋書(shū)·經(jīng)籍志一》

(2) 亦稱“離群索影”