To unmount. Used in written language and can also refer to use program called umount.(verb)
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Use "umount" in a sentence
"Also try unmounting the shares when they go away. "umount" won't work, and "umount - f" probably won't either, so try "umount - l"."
"(make sure it doesn't mount them, or 'umount' them first) or the livecd."
"His suggestion for others suffering from clingy back up drives: Parse together a terminal command similar to the one below (substituting name and other portions for whatever fits your system): sudo umount - f/Volume/Name\ Backup"