uncharted

uncharted waterways; the uncharted desert.

The ship had drifted into uncharted waters.

Far out in the uncharted backwaters of the unfashionable end of the western spiral arm of the Galaxy lies a small unregarded yellow sun.

As I opened up the computer to try and fix the problem, I realized that I was getting into completely uncharted waters and considered whether to leave it to the experts.

venturing into uncharted waters

navigating through uncharted paths

Donald trump is venturing into uncharted territory.

But we are entering really perilous and uncharted waters.

So we really are in uncharted waters.

You know, this is uncharted territory for both of us.

The situation is as wounding as it is uncharted.

Yikes, that's uncharted territory. You don't want to go there.

We're in sort of uncharted territory.

Uncharted waters, Mr. Reese. It's everywhere.

Antarctica was, for the most part, a century ago, uncharted.

Now, we're going to look at the expression 'uncharted territory'.