familiarity
UK: fəˌmɪliˈærəti | US: fəˌmɪliˈærəti
n. 1. A state of close acquaintance or knowledge about someone or something.
n. 2. The quality of being well-known or easily recognized.
n. 3. Informal or relaxed behavior resulting from frequent interaction.
The word "familiarity" traces back to the Latin familia (household), derived from famulus (servant). The suffix -iar (via Old French -ier) forms adjectives, while -ity (Latin -itas) creates abstract nouns. Originally denoting household relations, the term evolved to signify closeness or recognition through repeated interaction, reflecting its Latin roots in domestic bonds.
Her familiarity with the software made her the team’s go-to expert.
The actor’s familiarity with the audience ensured a warm reception.
Over time, their familiarity grew into a deep friendship.
He spoke with such familiarity that strangers mistook him for an old friend.
The guide’s familiarity with the terrain ensured a safe hike.