Как по Английски будет по необходимости

adverb

Of necessity.

noun

Require (something) because it is essential or very important rather than just desirable.

Примеры использования:

I need help now

plural noun

The things you must have for a satisfactory life

Примеры использования:

The special needs of the disabled

idiom

In such a manner as could not be otherwise

phrase

Unavoidably.

Примеры использования:

To alleviate labour shortages employers will, of necessity, offer better deals for part-timers

noun

Someone who represents another person in an emergency, but who has not officially been given the right to do so