"really" 这个词 有确定的意思，主要用作副词，表示“真正地”、“确实地”或“实际上”。它可以用来强调陈述的真实性，或者加强形容词、副词、动词的语气。以下是一些使用 "really" 的例句：

1. She really did a great job!

2. It's really cold today.

3. You ought really to have asked me first.

此外，"really" 还可以用于表示惊奇、怀疑或对某事的确认，例如：

1. Did she really say that？

2. I didn't really want to go, but he insisted.

总的来说，"really" 是一个十分常用的副词，用于强调各种情感和态度，并且通常与事实或现实相关联。