essentials

noun essentials

• basics — The basics of something are its simplest, most important elements, ideas, or principles, in contrast to more complicated or detailed ones.
• fundamentals — serving as, or being an essential part of, a foundation or basis; basic; underlying: fundamental principles; the fundamental structure.
• necessities — something necessary or indispensable: food, shelter, and other necessities of life.
• nuts and bolts — the essential or basic aspects: to learn the nuts and bolts of a new job.
• requisites — required or necessary for a particular purpose, position, etc.; indispensable: the requisite skills of an engineer.