Alternatively "disimprovement".
Via https://dict.leo.org/forum/viewUnsolvedquery.php?idThread=49... and https://dict.leo.org/forum/viewUnsolvedquery.php?idThread=16...
Alternatively "disimprovement".
Via https://dict.leo.org/forum/viewUnsolvedquery.php?idThread=49... and https://dict.leo.org/forum/viewUnsolvedquery.php?idThread=16...
Also misimprovement.
I don't think either of these 2 quite get the point across with the same "wavelengths" getting included.