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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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    force

    US /fɔrs, fors/

    UK /fɔ:s/

    • Noun
    • Group of persons trained for military action; army
    • Pressure; attraction
    • Transitive Verb
    • To use physical strength or violence to persuade
    • To break open (something) using force.
    develop

    US /dɪˈvɛləp/

    UK /dɪ'veləp/

    • Verb (Transitive/Intransitive)
    • To explain something in steps and in detail
    • To create or think of something
    A1TOEIC
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    surveillance

    US /sɚˈveləns/

    UK /sɜ:'veɪləns/

    • Uncountable Noun
    • Careful watching of a person/place, e.g. by police
    B2TOEIC
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