järkkymätön — meaning in English

English meaning

adamant adj Refusing to change one's mind or position; firmly determined.
imperturbable adj Staying calm and steady, even in a stressful situation.
impregnable adj Too strong or well-defended to be captured, broken into, or defeated.
inexorable adjective Impossible to stop or change once it's set in motion; unavoidable.
inexpugnable adjective Impossible to destroy or eliminate; impregnable.
steadfast adj Firm and unwavering in loyalty, belief, or purpose.
unwavering adjective Steady and not shaken; firm and resolute.

järkkymätön is used for these senses in English:

adamant (said of people and their conviction) Firm; unshakeable; unyielding; determined.
imperturbable Not capable of being, or not easily, perturbed, excited, or upset; calm and collected, even under pressure.
impregnable (figuratively) Too strong to be defeated or overcome; invincible.
inexorable Adamant; severe.
inexpugnable Impossible to eliminate or destroy; impregnable.
unflinching Without flinching; staying committed despite any difficulty; steadfast.
unwavering Always on course and steady.
unwavering Not doubting or unsure; decisive, firm, resolute.

adj Refusing to change one's mind or position; firmly determined.
noun A legendary stone or mineral once believed to be unbreakable, historically linked to diamond or lodestone.