Как по Английски будет sfide

noun

A call to someone to participate in a competitive situation or fight to decide who is superior in terms of ability or strength.

Примеры использования:

He accepted the challenge

verb

Exposure of the immune system to pathogenic organisms or antigens.

Примеры использования:

Recently vaccinated calves should be protected from challenge

noun

Proud and determined opposition against authority or against someone more powerful than you are

Примеры использования:

They are continuing to publish their newspaper, in defiance of government attempts to close it down.