The core idea of this root was:
This is still visible in words like boat, which were made from splitting wood, but the main branch of the family in Germanic language is about biting (“splitting with teeth”).
- to bite
- bit (“small part bitten off”)
- bitter (“biting taste”)
- bait (“makes you bite”)
- beetle (“biting insect”)
The root is also the origin of the word pita (the bread) and pizza.
Also the Latin based fission belongs here, which is still about splitting.