An elementary building block, e.g. a fundamental piece of knowledge.
A necessary commodity, a staple requirement.
Basic training.
Elementary, simple, fundamental, merely functional.
Of or pertaining to a base; having a pH greater than 7.
Unremarkable or uninteresting; boring; uncool.
Necessary, essential for life or some process.
The creation of a foundation or base.
The first process in decorating by means of enamelled colour.
Of, pertaining to, or supplying a foundation; foundational; fundamental.