جَنَّ

جَنَّ is a root word for many other words. Its different forms are in verbs and nouns. It means something hidden. So جنة

is a hidden reward of the Hereafter. جِن are creatures hidden from our eyes, جنون is the hiding or covering of the senses or aql

and جِنِىن is the foetus in the womb, also hidden from the eyes. Cool no?