adj
- of or being the essential or basic part
- not derived from or reducible to something else; basic
- most important element
adj
noun
- a preliminary election where delegates or nominees are chosen
- one of the main flight feathers projecting along the outer edge of a bird's wing
- (astronomy) a celestial body (especially a star) relative to other objects in orbit around it
- coil forming the part of an electrical circuit such that changing current in it induces a current in a neighboring circuit
to find a better fitting word. Finally, thanks to ChatGPT, the overall results have been greatly improved.