How high interest rates will go in the coming months is the great unknown, of course.

But all five main Democratic candidates remain virtually unknown to half or more of the likely primary voters in their own party, the poll found.

The walls sparkle with works by artists who were largely unknown, but full of promise, when he purchased them.

Still left virtually unknown, of course, were the writings and thoughts of women.

He has discovered a principle, a weapon, unknown to us and of immense power.

Unknown to you perhaps, and others of limited knowledge, but the ocean keeps no secrets from me.

The great unknown, of course, is whether there would be any players available who could approach the production of either player.

Some versions had the imprisoned person being an unknown or remote relative of the mark.

He was an unknown, nearly three hours behind Armstrong and of no harm to anyone.

It would seem unfair that all this is unknown of him.