प्रागैतिहासिक (Pragaitihasik)
Pragaitihasik
The word 'prehistoric' means a time before written history, when people lived in caves and used simple tools.
You pronounce 'prehistoric' like this: pree-his-tor-ik.
The word 'prehistoric' comes from the prefix 'pre-' meaning before, and 'historic' which relates to history.
The word 'prehistoric' in Kannada is 'ಪ್ರಾಚೀನ' (Prācīna).