viscid lubricating fluid secreted by the membrane lining joints and tendon sheaths etc.
a substance that is fluid at room temperature and pressure
subject to change; variable
continuous amorphous matter that tends to flow and to conform to the outline of its container: a liquid or a gas
characteristic of a fluid; capable of flowing and easily changing shape
smooth and unconstrained in movement
in cash or easily convertible to cash
affording change (especially in social status)