familiarity

他的过分亲昵让新同事感到不适。

His excessive ___familiarity made the new colleague feel uncomfortable.

她对当地文化的熟悉程度让她在旅行中如鱼得水。

Her ___familiarity with the local culture made her travel experience much smoother.

未经允许就使用她的昵称，这种自来熟的举动让她感到很不舒服。

She felt uncomfortable with his ___familiarity when he started using her nickname without permission.