How do you say ''was'' in french?

Was is the past tense of the verb to be for 1st and 3rd person singular. The French verb to be is être. The imperfect stem is ét-. The passé simple stem is fu-. The past participle is été. Here are some examples: She was happy. --> Elle était contente. I was attacked. --> J'ai été agressé(e). The church was erected in 1748. --> L'église fut construite en 1748. If this is confusing to you, try studying more about conjugation and verb tenses.
"Était"

But depends of the sentence it's in.