Using alt+backspace key in vim command line to delete by words

Question

Is there a way to use the alt+backspace in vim command line? It gets unruly when having to backspace /very/long/file/path individually instead of using

Answer 1

http://vim.wikia.com/wiki/Map_Ctrl-Backspace_to_delete_previous_word

:imap

sets ctrl backspace, i have to look at how to do alt