The Arabic word for knowledge of the unseen is عِلْم الغَيْب ('ilmul ghayb).. This word appears 6 times in the Quran.
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عِلْم الغَيْب
'ilmul ghayb
knowledge of the unseen
اللهُ وَحْدَهُ يَعْلَمُ عِلْمَ الغَيْبِ.
Only Allah has knowledge of the unseen.