immemorial
/ɪ.məˈmɔːɹi.əl/ adjective C2- That is beyond memory; ancient. · The rocks had stood overlooking the valley since time immemorial.
From the library
At others he will with his own hands tear down some other man’s gate and declare that a path has existed there from time immemorial, defying the owner to prosecute him for trespass.
It was a gloomy, dusty-looking apartment, such as journalists’ offices have always been from time immemorial.
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