To break or separate, especially by cutting. (Cambridge Dictionary)
To end a connection with someone or something. (Cambridge Dictionary)
To put or keep apart: Divide. (Merriam – Webster)
Divide by cutting or slicing, especially suddenly and forcibly. (Oxford Dictionaries)
To sever something means to cut completely through it or to cut it completely off. (Collins Dictionary)
Meaning of sever. Word pandit.