As an adjective:
* The diminishing returns on our investment forced us to reconsider our strategy. (Describing a decrease in returns)
* Her enthusiasm for the project was diminishing with each passing day. (Describing a decrease in enthusiasm)
* The diminishing population of the village led to the closure of the local school. (Describing a decrease in population)
As a verb:
* The doctor prescribed medication to diminish the pain. (Meaning to make smaller or less intense)
* His influence on the company was steadily diminishing after the merger. (Meaning to decrease in power or importance)
* The loud music was diminishing my enjoyment of the movie. (Meaning to make less significant or important)
In a phrase:
* The festival's crowds were diminishing as the day wore on. (Meaning becoming smaller in number)
* Her hope for a reconciliation was diminishing by the hour. (Meaning becoming less likely)
* The company's profits have been diminishing for the past quarter. (Meaning becoming smaller in amount)
Remember that "diminishing" can have slightly different meanings depending on the context. It's important to consider the overall meaning of the sentence to choose the most appropriate way to use the word.