IPA: /ˌpriːˈhjuːmən/
KK: /priˈhjuːmən/
Relating to a time before modern humans existed or to species that existed before humans.
The fossils found in the cave are from prehuman ancestors.
Prehuman → It is formed from "pre-" (meaning before) and "human" (from Latin "humanus", meaning human or man). The word "prehuman" refers to beings or characteristics that existed before the emergence of humans.
Think of 'pre-' meaning 'before' and 'human' referring to 'humans' — so prehuman describes something that existed before humans.