那位邻居总是对我们很冷淡，从不打招呼。

The neighbor is always ___unfriendly and never says hello to us.

这家餐厅的服务态度很不友好。

The service at this restaurant is quite ___unfriendly.

这个应用程序的操作界面很不友好，新手很难上手。

The app has an ___unfriendly layout that makes it hard for beginners to navigate.