1) The argument left a lingering souredness between the two friends.

2) The souredness in her tone hinted at a deeper underlying issue.

3) Their relationship was filled with souredness after the betrayal.

4) The souredness in the air was palpable as they avoided eye contact.

5) The souredness of the milk was evident by its unpleasant smell.

6) The souredness of the deal left him feeling cheated.

7) Years of neglect had led to a noticeable souredness in their marriage.

8) Despite their efforts, the souredness between them only grew over time.

9) The souredness of the situation made it difficult to find a resolution.

10) Their souredness towards each other was evident in their lack of communication.