* disimproving
Word used just about never by Almost Everyone
v. • To worsen something whilst trying to improve something.
"Ich wollte den Fleck entfernen, aber jetzt ist es schlimmer als zuvor..." "Das hast du richtig schön verschlimmbessert!"
"I wanted to get rid of that stain, but now it’s even worse..." "You’ve disimproved it very nicely!"
14 out of 17 German speakers have heard this