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    crucial

    US /ˈkruʃəl/

    UK /'kru:ʃl/

    • Adjective
    • Extremely important or necessary
    • Of great importance to the success of something.
    potential

    US /pəˈtɛnʃəl/

    UK /pəˈtenʃl/

    • Adjective
    • Capable of happening or becoming reality
    • Having or showing the capacity to develop into something in the future.
    • Uncountable Noun
    • someone's or something's ability to develop, achieve, or succeed
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    tough

    US /tʌf/

    UK /tʌf/

    • Adjective
    • (Of food) difficult to chew or bite through
    • Very difficult to do or deal with
    • Noun
    • A rough and aggressive person.
    crisis

    US /ˈkraɪsɪs/

    UK /'kraɪsɪs/

    • Noun (Countable/Uncountable)
    • Unstable situation of extreme danger or difficulty
    • A turning point in a disease.
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