unable to be expressed in words. "surges of speechless passion"
I have to wonder why it is a condition that is so short-lived. Here's a typical speech from the speechless:
I am speechless. I mean, I am really, really speechless. Do you hear me? I am literally speechless. You have no idea how speechless I am. I cannot possibly think of a single thing to say, because I am dumbstruck. How can you go on and on about this? I am speechless. Speechless, I tell you! Speechless! This is too stupid for words. There are no words. None. I am totally speechless. You've thought I was speechless before? That was nothing. NOTHING! You have never seen me as speechless as I am at this moment. I'd explain it too you, but it's moot because I'm mute. Speechless. Voiceless. I have nothing to say. Listen to me when I tell you I'm speechless.
Oh. My. God. If this is your idea of speechless, you need a new definition of the word!