Frequency: The word is one of the 3000 most common words in English.
1.
If someone or something is ~ to you, you recognize them or know them well.
He talked of other cultures as if they were more ~ to him than his own...
They are already ~ faces on our TV screens.
...the ~ names of long-established local firms.
ADJ: oft ADJ to n
~ity
Tony was unnerved by the uncanny ~ity of her face.
N-UNCOUNT
2.
If you are ~ with something, you know or understand it well.
Lesinko is quite ~ with Central Television. He worked there for 25 years...
ADJ: v-link ADJ with n
~ity
The enemy would always have the advantage of ~ity with the rugged terrain.
N-UNCOUNT: usu N with n
3.
If someone you do not know well behaves in a ~ way towards you, they treat you very informally in a way that you might find offensive.
The driver of that taxi-cab seemed to me ~ to the point of impertinence...
ADJ disapproval
~ity
She needed to control her surprise at the easy ~ity with which her host greeted the head waiter.
N-UNCOUNT
~ly
‘Gerald, isn’t it?’ I began ~ly.
ADV