be familiar with something
to have a good knowledge or understanding of something
familiar with
to have knowledge of someone or something

[TahlilGaran] Dictionary of Contemporary English ▲

be familiar with something to have a good knowledge or understanding of something, because you have used it, read about it etc before:
Before the interview, make sure you are familiar with the company’s main products.
It will take a little while to become familiar with the new software.
be used to something (also be accustomed to something formal) to have experienced something before, so that it no longer seems surprising, difficult, strange etc:
I’m used to eating spicy food.
Jay found the job hard to begin with, but he soon got used to it.
Consumers have grown accustomed (=become accustomed)to having a lot of choice.
Our staff are accustomed to dealing with the needs of foreign clients.
be at home with something to feel happy and confident about doing or using something, especially because you have had a lot of practice:
Tom’s lived in Moscow for 20 years and he’s completely at home with the language.
It takes a few weeks for people to feel at home with the system.
be comfortable with something/somebody to feel relaxed and not worried about doing something or being with someone:
We’re all becoming increasingly comfortable with buying things online.
The activities are intended to help new students feel more comfortable with each other..

[TahlilGaran] English Thesaurus ▲

familiar with
• familiar with (someone or something)
to have knowledge of someone or something
My friend is familiar with the streets in the city and can drive there easily.

[TahlilGaran] English Idioms Dictionary ▲

familiar with something
• familiar with (someone or something)
to have knowledge of someone or something
My friend is familiar with the streets in the city and can drive there easily.

[TahlilGaran] English Idioms Dictionary ▲

familiar with someone
• familiar with (someone or something)
to have knowledge of someone or something
My friend is familiar with the streets in the city and can drive there easily.

[TahlilGaran] English Idioms Dictionary ▲