Gloomy Sunday Afternoon Brain Teaser

A friend of mine posed this question to me in a recent e-mail. I didn't know the answer, and had to ask her in the end.

I wonder if any of you clever people out there that can work it out.


Question

There is a common English word that is nine letters long. Each time you remove a letter from it, it still remains an English word - from nine letters right down to a single letter.

What is the original word, and what are the words that it becomes after removing one letter at a time?

Clue - the original word starts with S and ends with g

I'll give you the answer later in the comments.

(How bored am I?)