[Inkscape-devel] Inset/outset path, what do they do?

Hi, I'm trying to find a correct translation (to spanish) for the "Inset path" and "Outset path" menu items but I can't figure out what they exactly do. I've been able to have a look at Freehand 10 and saw that it has the "Inset path" option under the "Modify/Alter Path" menu. I think this was translated as "Ampliar trazo" in the spanish version which means "Expand path" or "Extend path". Does this make sense? Would the "Outset path" command then be "Reduce path"?

This issue has kept me awake during my "siesta" this can't go on any longer ;-)

Thank you,