"开头"用英语叫做 "beginning"。
来源：beginning 是一个英语单词，来源于古英语 "beginnan"，意思是 "to begin"。
例句：
At the beginning of the movie, the main character is introduced. (在电影的开头，主人公被介绍了。)
The beginning of the school year is always exciting. (学年开始总是令人兴奋。)
This is just the beginning of our journey. (这只是我们旅程的开始。)