How do you spell it?

Many words cause difficulties for theirwriting. For example, how do you spell it? The word is finally written through a hyphen, since particles are something, either-always, and so on, are always written with words through a hyphen.

The word is finally used more often as an introductory word, but in our case it plays the role of a circumstance expressing the speaker's feeling, rejoicing at the fact that he waited for something:

• "At last the plants turn green!";
• "Finally, you know how to write it at last!";

or impatience, annoyance at this expectation:

• "Well, at last! Though they did something humanly."

The right version of writing: finally.