根据题意，英语字母u开头的称呼有uncle，uncle的意思是叔叔。例如英语句子，my uncle often plays basketball with my father on the weekend。周末我的叔叔经常跟我的爸爸打篮球。

Do you think your uncle is friendly to all of us?你觉得你的叔叔对我们都很友好吗