A known mistake is better than an unknown truth.

The known must be separated from the unknown.

The origin of the fire is unknown.

Sophie had been looking forward to getting another letter from the unknown sender.

These things are often unknown to the world.

This fact is all but unknown to them.

It is a pity that a man of your ability should remain unknown to the world.

The symbol "X" usually stands for an unknown quantity in mathematics.

At present, the cause of the disease is unknown.

The meaning is unknown to me.

The cause of the accident is unknown.

Although most islands in the ocean have been mapped, the ocean floor is generally unknown.

For all his genius, he is as unknown as ever.

His parentage was unknown to us.

In other words, physical obstacles, perhaps unknown to the original surveyor and engineer, will require alterations to be made in order to surmount them.

The reason she killed herself is unknown.

The cowboys rode into an unknown town.

The whereabouts of the suspect is still unknown.

When I opened my eyes again, all of a sudden an unknown lady was standing right in front of me.

A change of opinions is almost unknown in an elderly military man.

The cause of the fire was unknown.

The interdependence of thought and speech makes it clear that languages are not so much a means of expressing truth that has already been established, but a means of discovering truth that was previously unknown. Their diversity is a diversity not of sounds and signs but of ways of looking at the world.

The vast majority of high school students I know can't read an unknown word and pronounce the letters in the right order, let alone pronounce it correctly or naturally.

Smallpox was unknown to Native Americans.

Many great thinkers who were unknown while alive became famous after death.

There are known knowns; there are things we know we know. We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns – the ones we don't know we don't know.

When you come across unknown words, you have to look them up in the dictionary.

Perhaps the only adjective in the English language that can follow the noun it modifies is "unknown".

The source of the fire is unknown.

It is estimated that a great number of his inventions remain unknown to date.

Tom is an unknown artist.

Her face is really swollen, but she says that it isn't the mumps. Apparently, it's some unknown hereditary disease.

This is unknown country to me.

Her name was unknown.

Lonesome George, the last remaining tortoise of his kind, died of unknown causes.

There any many answers to this question, and people create many legends about the Devil’s stone: the human mind cannot calm down until it explains to itself the dark, the unknown, and the vague.

Tom and Mary were looking for the unknown sentence and were wondering who was its author.

Most English words are unknown to most English speakers.

The Latin language is not entirely unknown to me, but I altogether lack the ability to speak it.

The enemy cavalry crossed the river by an unknown ford.

However, when listening to an unknown foreign language, our ability to discern different words is lost, and we recognize speech as being a stream of sounds without many pauses.

How can I sleep when there are unknown lands within?

Some years ago, large ships were sent towards the North Pole, to explore the distant coasts, and to try how far men could penetrate into those unknown regions.

He's a star in Germany, but completely unknown in America.

This is neither new nor unknown.

Many years ago I wandered for a while on highlands completely unknown to tourists.

My experience shows that Esperanto lets you find a new insight into many cultures formerly unknown to you, inspiring you to learn them further.

There are things known and there are things unknown, and in between are the doors of perception.

The builder of those houses is unknown.

Tom has twenty first cousins on his mother's side, and an unknown number on his father's side.

There was another avalanche on the road to Ekkjeskaret in Odda municipality in Hordaland on Tuesday night. It is unknown whether anyone was caught in the avalanche.

Everything unknown is doubted.

She went at the invitation of an unknown man.

I regret to say that this is unknown to me.

The exact date of Jesus' birth is unknown.

The cause of the fire is unknown.

Because the saxophone wasn't invented until the mid-nineteenth century, it was unknown to Mozart or to Beethoven.

We are being attacked by an unknown enemy.

Jostaberries are a hybrid cross of blackcurrant with gooseberry, and they're at least as tasty as they're unknown.

Dan killed his wife and made it appear as the work of an unknown assailant.

Dan was killed by an unknown intruder.

Dan was seen talking to an unknown man near the restaurant.

Dan saw Linda talking to an unknown man outside her home.

Prevention of stillbirth is very difficult, as many causes of stillbirth remain either unknown or untreatable.

The genome of this virus is unknown.

The cause of the fire is yet unknown.

Tom thinks he discovered that stoats have a language previously unknown to humans, that is so complex that even after years of study he barely mastered the basic vocabulary. In reality, stoats fooled him into thinking that so that he didn't realise the truth, which is that they have been talking to him telepathically all that time.

The number of casualties is still unknown.

Their whereabouts are unknown.

Its origin remains unknown.

Its origin is unknown.

Begging from unknown entities isn't wise.

For the first time in my life, I found myself all alone in an unknown city.

The exact cause is unknown.

This word's origin is unknown.

An unknown number of victims may be trapped beneath the rubble.

Fear comes from the unknown.

One of my children was born with some unknown disease.

The nub of the dispute was unknown but its results were easy to predict.

The purported director of the film is still unknown.

Tom's condition is unknown.

"Known" is the opposite of "unknown".

For some unknown reason, he got up on the table and started singing.

The only thing that remains unknown to man is man himself.

The cause of death is unknown.

As I opened the door, there stood an unknown man.

Tom's present whereabouts are unknown.

Tom's current whereabouts are unknown.

Tom's real name is unknown.

Tom's last name is unknown.

The oldest and strongest emotion of mankind is fear, and the oldest and strongest kind of fear is fear of the unknown.

The motive is unknown.

Tom's fate is unknown.

From the standpoint of daily life, however, there is one thing we do know: that man is here for the sake of other men —above all for those upon whose smile and well-being our own happiness depends, and also for the countless unknown souls with whose fate we are connected by a bond of sympathy.

The killer's identity is still unknown.

An unknown intruder shot Fadil in his Cairo home.

The word's origin is unknown.

Often a person fears everything unknown.

He has a good chance of becoming the president of France next Sunday even though he was still unknown three years ago!

We use the word "ĝi" when we are not talking about a man or a woman, but about something that has no sex or whose sex is unknown or indifferent to us. Consequently, we can almost always use this word very well in place of "tio", whose meaning is almost the same.

There was at once a profound silence; every one left off dancing, and the violins ceased to play, so attracted was every one by the singular beauties of the unknown newcomer.