For Bitcoin:

Permissionless : Anyone can participate in the Bitcoin network without needing approval from a central authority. This means anyone can send transactions, mine, or run a node freely.

Censorship-Resistant : Once a Bitcoin transaction is confirmed, it cannot be reversed or blocked. The decentralized nature of the network ensures no single entity can censor transactions.

Both features work together: Bitcoin's open, permissionless system allows for decentralized, censorship-resistant transactions.