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rudimentary

adjective
 
 
/ˌruː.dɪˈmen.tər.i/ US  /-tɚ-/ formal

Definition

basic: Her knowledge is still only rudimentary.Crude and basic describes methods, equipment, systems, etc. that are simple and not very well developed: specialized Some unusual fish have rudimentary legs.Crude and basic
(Definition of rudimentary adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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