Как по Английски будет einst

adverb

At some time in the future.

Примеры использования:

Some day i'll live in the countryside

idiom

At some time in the future

Примеры использования:

I'd love to go to china some/one day.

adverb

On one occasion or for one time only.

Примеры использования:

They deliver once a week

conjunction

As soon as; when.

Примеры использования:

Once the grapes were pressed, the juice was put into barrels

adjective

Former.

Примеры использования:

The erstwhile president of the company

adverb

Formerly.

Примеры использования:

Mary anderson, erstwhile the queen of america's stage