My dear, is that still a three-letter word for you?

The most common three-letter word in the language was "the."

It's so small, a three-letter word is far too lavish to describe it.

Why did people who had to have everything spelled out in three-letter words infuriate him so much?

And it was only a three-letter word, at that.

I can sum him up in one three-letter word: man.

Worm people name all their genes with a three-letter word and a number.

They'd been taken out, then arranged into one simple, three-letter word.

At the end of the game there is a "Pyramid" which starts with a three-letter word.

The peculiar lack of three-letter words showed that "the" was not used in the message.