What does the root word for fid mean?

The root word "fid" comes from the Latin word "fīdus," which means "faithful" or "trustworthy."

This root is found in many English words, including:

* Fidelity: faithfulness, loyalty

* Confide: to tell secrets to someone you trust

* Infidel: a person who does not believe in a particular religion

* Diffident: lacking confidence, shy

So, "fid" essentially means "faith" or "trust."