The phrase "sloughs off" refers to the act of shedding or getting rid of something, whether it be physical or metaphorical. Antonyms for this phrase would include words such as "keeps," "retains," "maintains," or "holds onto." These words imply the opposite action, instead of letting go or shedding, one is preserving or grasping onto something. In other words, antonyms for "sloughs off" describe actions of possession, attachment, and retention, rather than actions of release and detachment. By using antonyms, the opposite meaning is conveyed, emphasizing the importance of holding onto something rather than discarding it.