Final answer:
The word 'pivotal' describes something crucial to success. It is essential in understanding its significance.
Explanation:
Pivotal means of crucial importance to the success of something else. For example, in a basketball game, a pivotal moment could be a last-second shot that determines the winner.
Phenomenal, blatant, and rogue do not directly convey the idea of crucial importance like pivotal does. Stifle means to suppress, not signify importance.
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