crucial

/ˈkɹuː.ʃəl/

adjective

Essential or decisive for determining the outcome or future of something; extremely important.
"A secure supply of crude oil is crucial for any modern nation, let alone a superpower."
Cruciform or cruciate; cross-shaped.
(Bermuda) Very good; excellent; particularly applied to reggae music.
"Delbert Wilkins is the most crucial pirate radio DJ in Brixton."

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