What's that quick way to force a word to unhyphenate?

I almost feel foolish asking this, but tonight for some reason I'm blanking out on a keyboard sequence I use practically daily but which, for some reason, is escaping me at the moment.  I can't find a reference to it anywhere in my notes or online.  The key combo includes a hyphen, and you type this combo just ahead of just one word when you don't want just THAT one word to hyphenate. It isn't a setting for the document overall; it's just a quick way to prevent hyphenation, for example, at the end of a line of text, vs. using a forced return (which might throw things off if the text shifts later).  Does anyone out there know the key combo I'm talking about?  I think I've done it on automatic for so long that I just haven't thought about what it is, and now that I have to tell someone, I can't!  Standing by for your most helpful responses, and please don't judge!!! LOL