Savvy.

He acquainted himself with his job.

I'm at ease in English.

I'm comfortable in English.

I'm at home in English.

But it is a place where sex workers and their clients come.

I'm familiar with the situation.

Sir, I am fluent in six million forms of communication.

We know we're looking for someone trained in medicine.

I thought Oh my God, maybe I can do the same with these boring newspapers.

John is familiar with the business.

He is at home on batting.

He is quite at home with computers.

I know about laminar flow when it comes to air piercing objects, and that does it consummately well, you can see it can.

I am fluent in over six million forms of communication and can readily...

He is at home in a variety of fields.

He has good knows of every field.

He is completely at home in physics.

He is quite at home in English.

He is at home in French.

I am wellversed in all the customs...

My guy is a top... ...guy.

Dr. Faust was well versed in alchemy.

Jane is familiar with the Japanese language.

She is quite at home in English.

He is at home in American literature.

He is well acquainted with ancient history.

He is familiar with the entertainment world.

He is well versed in geometry.

He is well acquainted with the history of England.

He is well acquainted with French literature.

He is very knowledgeable about French literature.

He is familiar with this computer.

Junko is quite familiar with English.

I am familiar with this subject.

I am familiar with this computer.

His background is in deep biotechnology.

He has the subject at his fingertips.

He is thoroughly familiar with the business.

He is familiar with four languages.

I am familiar with this subject.

And on the day I met my father for the first time,

What came out of it?

He has a good knowledge of Japanese religion.

He is at home with the geography of Tokyo.