The rest of the party seemed to be on firmer ground.

The major felt that he was getting on to firmer ground.

"We might not be on firm legal ground here," Howard said.

At these words, my feet seemed to feel firm ground.

What he really wanted to see most was firm ground to walk on, but there didn't seem to be any of that.

But we're not on very firm ground this time because he is in his own country.

Then suddenly, with a feeling of relief, he felt firm ground once again beneath his feet.

But it can never give a man the feeling that he's got firm ground under his feet.

R She stood again on the relatively firm ground of another vehicle.

We are on very firm ground in what is happening here.