From ὄπις opis (regard; from G3700) with enclitic of source; from the rear (as a secure {aspect}) that {is} at the back (adverb and preposition of palce or time): - {after} {backside} behind.
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Matrix
Heb 11:38(Of whom the world was not worthy:) they wandered in deserts, and in mountains, and in dens and cavesG3692 of the earth.