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    essential

    US /ɪˈsɛnʃəl/

    UK /ɪ'senʃl/

    • Adjective
    • Extremely or most important and necessary
    • Fundamental; basic.
    • Noun
    • A concentrated hydrophobic liquid containing volatile aroma compounds from plants.
    B1TOEIC
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    alternative

    US /ɔlˈtɚnətɪv, æl-/

    UK /ɔ:lˈtɜ:nətɪv/

    • Countable Noun
    • Something different you can choose
    • Adjective
    • A different choice
    A2TOEIC
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    tend

    US /tɛnd/

    UK /tend/

    • Intransitive Verb
    • To move or act in a certain manner
    • Transitive Verb
    • To take care of
    effective

    US /ɪˈfɛktɪv/

    UK /ɪˈfektɪv/

    • Adjective
    • Working efficiently to produce a desired result
    • In operation; in force.
    A1TOEIC
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