He laced the branches with brush to make it look entirely impassable.

The boulders, which looked impassable from this distance, marked the head of a small, incredibly steep and dangerous chute.

Let's hope it looks impassable to snake eyes.

His mount leapt the stream that had looked so impassable to Pattie with apparent ease.

It's always possible that there was a way through and somebody backfilled the passage behind them to make it look impassable.

There was indeed a large cave in front of them now, and it looked virtually impassable.

At first sight, the way ahead looked all but impassable -with crags, crevices, and fallen boulders.

When a situation looks completely impassable, a good idea is often to leave it and come back later with new items.

From below, it looked impassable, but from above, a faint trail was visible, threading down to another small clearing.

The immediate landscape looks rocky for most people, and, beyond it, the going looks increasingly impassable.