prehistoric
Definitions
Relating to or denoting the period before written records.
Extremely old or out-of-date.
Examples
Archaeologists discovered a collection of prehistoric tools buried deep within the cave.
The museum features an impressive exhibit dedicated to prehistoric creatures that once roamed the earth.
Synonyms
ancient primeval archaic antediluvian primordial paleolithic very old
Antonyms
modern contemporary current recent new futuristic up to date