familiarity

familiarity /fəˌmɪliˈerəti/ noun
familiarity
/fəˌmɪliˈerəti/
noun
Britannica Dictionary definition of FAMILIARITY
[noncount]
1 
: the state of being familiar with something : the state of having knowledge about something — usually + with
◊ The expression familiarity breeds contempt means that knowing a lot about someone or something can cause you to like that person or thing less.
2 
: a friendly and informal way of acting or talking