Kaddosh, in Hebrew, means “holy”, however in Hebrew, “holy” doesn’t mean moral, supreme, sacred or anything of the sort.
It means “otherness”.
And now you know.
Now reconsider “Holy, holy, holy is the lord God almighty!” and why the Hebrews had (and Jews today have) few doctrines about God and why they used personification to talk about God; such as memra, word, sophia, and so on so as to keep God holy, other.
Contrast that with Evangelicalism and how completely ordinary, known, absolute “God” has become.