What is the prefix word for code?

There isn't a single, universally accepted prefix word for "code". However, depending on the context, you could use these options:

General use:

* Crypto- (meaning "hidden" or "secret") - Used for things related to encryption and secret codes.

* Cypher- (meaning "secret writing") - Similar to "crypto-", often used in the context of cryptography and code breaking.

* Code- (meaning "related to code") - This is a simple and direct prefix often used in technical contexts.

Specific contexts:

* Bio- (meaning "life") - Used for genetic codes and biological processes.

* Source- (meaning "origin") - Used for the original code or the source of information.

* Open- (meaning "available to all") - Used for code that is publicly available.

* Closed- (meaning "not accessible") - Used for code that is not publicly available.

The best prefix to use will depend on the specific meaning you want to convey.