cardinal central fundamental key primal
cardinal%5:00:00:important:00 central%5:00:00:important:00 fundamental%5:00:00:important:00 key%5:00:00:important:00 primal%5:00:00:important:00
bistven centralen glaven osnoven osrednji srednji temeljen
serving as an essential component
a cardinal rule the central cause of the problem an example that was fundamental to the argument computers are fundamental to modern industrial structure