Real being; existence. / The act of maintaining oneself at a minimum level. / Inherency. / Something (food, water, money, etc.) that is required to stay alive.

(intransitive) To sink or fall to the bottom; to settle, as lees. / (intransitive) To fall downward; to become lower; to descend; to sink.

(ergative) To sign up to have copies of a publication, such as a newspaper or a magazine, delivered for a period of time.

An underlying layer; a substratum. / The substance lining the bottom edge of an enclosure. / (biochemistry) A substance acted upon, as by an enzyme.

(obsolete, transitive) To strew or lay under.

Having very slight furrows.

(set theory, of a set S) A set A such that every element of A is also an element of S. / A group of things or people, all of which are in a specified larger group.

(transitive) To take a subset of. / (transitive, computing, typography) To extract only the portions of (a font) that are needed to display a particular document.

Following in time; coming or being after something else at any time, indefinitely. / Following in order of place; succeeding.

(geology) A subsequent stream or faultline.