elementary

Adjective
  1. Easy and not involved or complicated (synset 300753900)
    "an elementary problem in statistics"; "elementary, my dear Watson"; "a simple game"; "found an uncomplicated solution to the problem"
    similar to: easy - posing no difficulty; requiring little effort
    same as: simple, uncomplicated, unproblematic
  2. Of or pertaining to or characteristic of elementary school or elementary education (synset 302730421)
    "the elementary grades"; "elementary teachers"
  3. Of or being the essential or basic part (synset 301862151)
    "an elementary need for love and nurturing"; "a basal reader"
    similar to: basic - pertaining to or constituting a base or basis
    same as: basal, elemental, primary

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