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 attain maturity, to become mature or ripe.
To make (something, e.g. fruit) ripe or mature.
To make (someone) mature.
To proceed toward maturity: full development or completion (either of concrete or of abstract things, e.g. plans, judgments, qualities).
To proceed toward or become mature or full-grown, either physically or psychologically; to gain experience or wisdom with age.
To bring (something) to maturity, full development, or completion.
To reach the date when payment is due.
Brought to a state of complete readiness.
Profound; careful.
Fully developed; grown up in terms of physical appearance, behaviour or thinking; ripe.
Suitable for adults only, due to sexual themes, violence, etc.