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English definition of “indispensable”

indispensable

adjective uk   /ˌɪn.dɪˈspen.sə.bl̩/ us  
C2 Something or someone that is indispensable is so good or important that you could not manage without it or them: This book is an indispensable resource for researchers. His long experience at the United Nations makes him indispensable to the talks.
indispensability
noun [U] uk   /ˌɪn.dɪ.spen.sɪˈbɪl.ɪ.ti/ us    /-ə.t̬i/
(Definition of indispensable from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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