There are no such English words as "dedend" or "dedent".

I beg to differ.
dedent -- v.tr.

to remove a depression in a surface made by pressure or a blow:
"The panelbeater dedented my door".

Or... "The Gypsy offered to dedent my car's fender, but only made things
worse." (This actually happened. A policeman stepped in and chased him off.)