indefinable

He had that indefinable sixth sense that distinguishes gifted warriors from good ones.

He knew what was going on and he never, in my experience, took risk that was indefinable.

And now there was added to this devotion an element of indefinable anxiety which made its vigilance unceasing.

But the impression was so fleeting as to be indefinable, and soon I was busy getting everyone settled in the car.

In my dreams again and again an indefinable shadow mockingly comes and cries to me, he is not to be yours, he is to be mine.

There was in it the indefinable hardening and ageing which seemed to Boyson to have affected the whole personality.

The features, he tells us, were distinguished neither by regularity nor classical beauty, but had an indefinable charm.