Englishfor English speakers
elementary
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adjective
(= simple, uncomplicated)
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
—
adjective
of or pertaining to or characteristic of elementary school or elementary education
the elementary grades
elementary teachers
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adjective
of or being the essential or basic part
an elementary need for love and nurturing
idempotent
—
adjective
unchanged in value following multiplication by itself
this matrix is idempotent