Sentence examples for only was from inspiring English sources

"only was" is not a correct or usable phrase in written English.
The word "only" is typically an adverb or adjective, and "was" is a verb. They do not go together in a grammatically correct sentence. If you are trying to indicate a strong emphasis on something, you could use the phrase "was only." For example, "She was only fourteen years old when she won the international chess championship." This emphasizes the young age of the champion. Alternatively, you could use "only" as an adjective, as in "She was the only student in her class to receive a perfect score on the exam." This indicates that she was the sole student with that achievement. However, "only was" is not a correct combination. A possible rephrased sentence could be: "The only thing that mattered to her was winning the championship."