成唯識論述記 5.221

5.221

述曰：有情由此四煩惱故，恒執我等生死淪廻。此中「淪」字，謂淪沒也。廻者，轉也，如車輪廻無有休息，淪沒生死不能出離、得聖道等。此解「煩惱」字，故名煩惱。惱亂行者，煩藉身心故。

The Commentary states: Sentient beings, on account of these four afflictions, constantly grasp at a self and so forth, sinking and revolving in saṃsāra. Here, the word "sinking" (lún) means drowning. "Revolving" (huí) means turning, like the turning of a wheel without rest, sinking into saṃsāra and unable to escape or attain the noble path and so forth. This explains the term "afflictions" (kleśa): they are therefore called afflictions. They vex and disturb practitioners, afflicting and burdening their bodies and minds.