This really is a step into the unknown for us.

He really ought not to be, but it was a question of the unknown for him.

It's not unknown for certain churches to support the cause.

And that outside world is more unknown for most European nations.

The teacher may ask the learners which words are unknown for them.

However, it is not unknown for symptoms to appear after several months or years.

His purpose and true identity are unknown for the majority of the game.

It is unknown, for instance, whether he ever married or had children.

The unknown for the last couple of days had been put in its place.

Unknown to them - and to everybody else, for that matter - she was one of my victims.