familiar

(usually followed by `with') well informed about or knowing thoroughly.

“familiar with the complex machinery”

“he was familiar with those roads”

Having mutual interests or affections; of established friendship.

“on familiar terms”

Well known or easily recognized.

“a familiar figure”

“familiar songs”

Within normal everyday experience; common and ordinary; not strange.

“familiar ordinary objects found in every home”

“a familiar everyday scene”

A spirit (usually in animal form) that acts as an assistant to a witch or wizard.

A friend who is frequently in the company of another.

A person attached to the household of a high official (as a pope or bishop) who renders service in return for support.