"elementary" in the adjective sense
1. elementary, simple, uncomplicated, unproblematic
easy and not involved or complicated
"an elementary problem in statistics"
"elementary, my dear Watson"
"a simple game"
"found an uncomplicated solution to the problem"
2. elementary
of or pertaining to or characteristic of elementary school or elementary education
"the elementary grades"
"elementary teachers"
3. elementary, elemental, primary, basal
of or being the essential or basic part
"an elementary need for love and nurturing"
"a basal reader"
Source: WordNet® (An amazing lexical database of English)
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