Familiarity

1.

~ with something (thorough knowledge of a thing, subject, etc) ភាពស្និទ្ធិស្នាល, ការចេះ, ការដឹង, ការស្គាល់សប់អាន, ការស្គាល់គ្នា, រាប់អាន, ការនៅដឹងខ្លួន (មិនសន្លប់) / familiarity with a place ការស្គាល់ឬដឹងឮច្បាស់ familiarity of a tune ការធ្លាប់ប្រទះមកហើយ, disgusting familiarity ភាពជិតស្និទ្ធពេក
Example: His familiarity with the local languages surprised me.

1.

The state of being familiar; intimate and frequent converse, or association; unconstrained intercourse; freedom from ceremony and constraint; intimacy; as, to live in remarkable familiarity.

2.

Anything said or done by one person to another unceremoniously and without constraint; esp., in the pl., such actions and words as propriety and courtesy do not warrant; liberties.

Synonyms

1.

acquaintance, fellowship, friendship, sociability

2.

frankness, informality, intimacy, liberty, unreserved

Antonyms

1.

constraint, distance, haughtiness, presumption, reserve