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threshold

mastery

UK /ˈθɹeʃəʊld/ US /ˈθɹɛʃ(h)oʊld/noun

card 1 of 10 · synonym

Which word is closest in meaning to 'threshold' in this sentence?

The first half of this century has been referred to as the golden age of medicine. To me it seems more probable that we are on the threshold of a much greater age.