S: (n) entity (that which is perceived or known or inferred to have its own distinct existence (living or nonliving))
S: (n) part, portion, component part, component, constituent (something determined in relation to something that includes it) "he wanted to feel a part of something bigger than himself"; "I read a portion of the manuscript"; "the smaller component is hard to reach"; "the animal constituent of plankton"
S: (n) relation (an abstraction belonging to or characteristic of two entities or parts together)
S: (n) fluid (continuous amorphous matter that tends to flow and to conform to the outline of its container: a liquid or a gas)
Adjective
S: (adj) fluid, unstable (subject to change; variable) "a fluid situation fraught with uncertainty"; "everything was unstable following the coup"
S: (adj) fluid, runny (characteristic of a fluid; capable of flowing and easily changing shape)
S: (adj) fluent, fluid, liquid, smooth (smooth and unconstrained in movement) "a long, smooth stride"; "the fluid motion of a cat"; "the liquid grace of a ballerina"
S: (adj) fluid, liquid (in cash or easily convertible to cash) "liquid (or fluid) assets"