darkspot
nounUK /ˈdɑːkspɒt/
US /ˈdɑːrkspɑːt/
A darkspot is a small dark mark on something.
There was a darkspot on the wall where the picture used to hang.
OTHER MEANINGS
2. A place on a map or surface that is dark or shaded.
The map showed a darkspot in the middle of the forest.
3. A gloomy or unhappy feeling.
He felt a darkspot in his heart after saying goodbye.
4. A spot on a screen or photo that looks dark.
A darkspot appeared on the photo because of dust on the lens.