prehistoric
[adjective]
Synonyms: earliest, early, primeval, primitive, primordial

[TahlilGaran] English Synonym Dictionary ▲

pre‧his‧tor‧ic /ˌpriːhɪˈstɒrɪk◂ $ -ˈstɔː-, -ˈstɑː-/ adjective
[Word Family: noun: historian, history, prehistory; adjective: historic, prehistoric, historical; adverb: historically]

1. relating to the time in history before anything was written down:
prehistoric burial grounds
prehistoric animals

2. very old-fashioned – used humorously:
a prehistoric attitude towards women

[TahlilGaran] Dictionary of Contemporary English ▲