Of extreme importance; vital to the resolution of a crisis:
— A crucial moment in his career.
— A crucial election.
— A crucial issue for women.

synonym: important.

Roget 219: crossing etc. v.; crossed, matted &c., v.. transverse.    cross, cruciform, crucial; retiform^†, reticular, reticulated; areolar^†, cancellated^†, grated, barred, streaked; textile; crossbarred^†, cruciate^†, palmiped^†, secant; web-footed.    ... show more

Roget 478: demonstrating etc. v., demonstrative, demonstrable; probative, unanswerable, conclusive; apodictic^†, apodeictic^†, apodeictical^†; irresistible, irrefutable, irrefragable; necessary.    categorical, decisive, crucial.    demonstrated etc. v.; proven; unconfuted^†, unanswered, unrefuted^†; evident etc. 474.    deducible, consequential, consectary^†, inferential, following.    [demonstrated to one's satisfaction] convincing, cogent, persuasive (believable) 484.    ... show more

Polish: ważny

Having crucial relevance.

Of the greatest importance:
— Crucial information.

synonyms: all-important, all important, essential, of the essence.

Polish: główny, zasadniczy, najważniejszy, właściwy, pryncypalny