primary
pri-ma-ry
adjective
Relating to the first stage of development or a series.
"She teaches children in primary school."
noun
One of the three basic colours (red, yellow, blue) from which others are mixed.
"Children learn about primary colours."
adjective
Most important or main; first in order or rank.
"Our primary objective is customer satisfaction."
Thesaurus
Synonyms: basic, elementary, elemental, basal, underived, capital, particular, original, special, first-string, firsthand, direct
Antonyms: secondary