To abandon.
"leave behind" is correct and can be used in written English. You can use it when you want to emphasize that something has been left in a place and will remain there. For example, "I left the books behind in my bedroom when I moved.".
Q. Leave behind?
What can business travellers safely leave behind?
What did coal leave behind?
What do they leave behind?
What must they leave behind?
What would they leave behind?
Who did you leave behind?
Ludwig does not simply clarify my doubts with English writing, it enlightens my writing with new possibilities
Simone Ivan Conte
Software Engineer at Adobe, UK