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.
To make subservient.
To treat as of less value or importance.
To make of lower priority in order of payment in bankruptcy.
One who is subordinate.
Descending in a regular series.
Placed in a lower class, rank, or position.
dependent on and either modifying or complementing the main clause
Submissive or inferior to, or controlled by authority.