sourness

US /ˈsaʊr.nəs/
UK /ˈsaʊr.nəs/
"sourness" picture
1.

the quality of being sour; acidity.

:
The sourness of the lemon made her eyes water.
He added sugar to reduce the sourness of the sauce.
2.

a disagreeable or unpleasant quality or disposition.

:
There was a certain sourness in his tone when he spoke about his ex-colleague.
The constant criticism led to a general sourness in their relationship.