0
unimaginable
US
/ˌʌn.ɪˈmædʒ.ɪ.nə.bəl/
UK
/ˌʌn.ɪˈmædʒ.ɪ.nə.bəl/
describes something that is difficult to imagine because it is so bad, good, big, etc.
Persian equivalent:
Example:
unimaginable wealth