For a literal translation, you could use:
* Mau loa: This means "forever" or "always," and is a common way to express eternity.
* Mau mau: This is a similar word to "mau loa," emphasizing the lasting nature of something.
* Mau ka lōʻihi: This translates to "forever and ever," a more poetic and emphatic way to express eternity.
For a more figurative or poetic translation, you could use:
* ʻAʻole pau loa: This translates to "never ending," conveying the idea of something that will never cease to exist.
* No ka lōʻihi o ka honua: This translates to "for the length of the earth," implying a timeless existence.
* No ka lōʻihi o ke kai: This translates to "for the length of the sea," also implying a timeless existence.
Ultimately, the best way to translate "eternally" in Hawaiian depends on the specific context and the meaning you want to convey.