How does john keats make use of archaic language?

John Keats often used archaic language in his works to create a sense of timelessness and to evoke a feeling of nostalgia and romanticism. By using Words and phrases that were no longer commonly used in his own time, Keats aimed to enhance the beauty and musicality of his poetry, as well as to pay tribute to earlier literary traditions. This use of archaic language added a sense of depth and richness to his works, contributing to the overall impact of his poetry.