The word “paradise” is a Persian loanword into hebrew, and into english as well. The meaning seems consistent with a cultivated garden, a forest, or a park that’s walled off and reserved for the king’s personal enjoyment.
Though the word only appears three times in the biblical text, it is more widely used in later centuries, and we're also invited to think about the Garden in Eden as the paradise of a king.
Here are the ways we can understand “paradise” when it shows up in the biblical text:
• in Song of Songs 4:13 this garden being spoken about is walled off from others and for the king’s sole enjoyment
• in Ecclesiastes 2:5 the same Teacher who speaks about building these paradises also identifies himself as king in 1:12
• in Nehemiah 2:8 this paradise is identified explicitly in the text as “the paradise that is the king’s”
Your limbs are an orchard of pomegranates
And of all luscious fruits,
Of henna and of nard—