crucial, important -- (of extreme importance; vital to the resolution of a crisis; "a crucial moment in his career"; "a crucial election"; "a crucial issue for women")
crucial -- (having crucial relevance; "crucial to the case"; "relevant testimony")
all-important, all important, crucial, essential, of the essence -- (of the greatest importance; "the all-important subject of disarmament"; "crucial information"; "in chess cool nerves are of the essence")
(Sound)
