5. (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"
6. (adj)fluid, liquid in cash or easily convertible to cash "liquid (or fluid) assets"
7. (adj)fluid, mobile affording change (especially in social status) "Britain is not a truly fluid society"; "upwardly mobile"