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English definition of “rudimentary”

rudimentary

adjective uk   /ˌruː.dɪˈmen.tər.i/ us    /-tɚ-/ formal
basic: Her knowledge is still only rudimentary.Crude and basic describes methods, equipment, systems, or body parts that are simple and not very well developed: Some unusual fish have rudimentary legs.Crude and basic
(Definition of rudimentary from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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