Fluid
Part of speech: noun
Definition: Any state of matter which can flow with relative ease, tends to assume the shape of its container, and obeys Bernoulli's principle; a liquid, gas or plasma
Part of speech: adjective
Definition: Of, or relating to fluid. In a state of flux; subject to change. Moving smoothly, or giving the impression of a liquid in motion. Convertible into cash.
Example sentence: I don't know why we have to put things in boxes of superlatives. That isolates them. Life is fluid, and the minute you start trying to put a line around something, it will deceive you and go away.
Changeful
Part of speech: adjective
Definition: Changing frequently; very susceptible to change; variable; fickle.