primary
adjective/pɾi.ˈma.ɾju/medium
pri·má·rio
Definition
Occupying the first place in importance, order, or time; fundamental, main.
Red, blue, and yellow are primary colours.
The primary sector of the economy includes farming.
Common collocations
primary educationprimary colourprimary sectorprimary objective
Etymology
Do latim 'primarius' ('de primeira ordem, principal').