expressing yourself readily, clearly, effectively
When you learn another language, the goal is to become fluent: to have the words flow naturally, without your having to translate them into your first language. The noun form of "fluent" is "fluency."
having an abundant supply of money or possessions of value
Foreign travel is becoming ever more popular among China's increasingly
citizens.BBC (May 17, 2013)
To be "affluent" is to have enough money that it just flows in and out of your accounts The idea that money flows is also seen in the word "currency." Doesn't that word bring to mind a current of flowing water?
move or progress freely as if in a stream
When something is in flux, it is in a state of change. In the example sentence, the human body is described as being in a constantly changing state of rebuilding and repairing itself.
When we say that something fluctuates, we mean that it changes easily and constantly. We often hear this term in a business context, with the stock market fluctuating every day.
an acute febrile highly contagious viral disease
The latest threat emerged in China, where a previously unknown
virus infected dozens and killed at least 17 people recently.New York Times (Apr 30, 2013)
The word "influenza" is commonly known as "the flu." You know that the flu is contagious, with germs flowing easily from one person to another.
a place where things merge or flow together
pleasing to the ear
The root "melli-" means "honey." So, a mellifluous voice is a voice that flows richly and sweetly, like honey.
more than is needed, desired, or required
The word "superfluous" is similar to "overflow" in that the prefix "super-" means "over and above," or "more than is necessary." When something is superfluous, it is not needed, like an overflow.
a foul-smelling outflow or vapor
However, acting on my best judgment, I struck a downward course, and then suddenly a horrible
was wafted to my nostrils.Mitford, Bertram
Although you can find sentences using "effluvium" to refer to the flow of pleasing vapors, it is usually used in a negative context, referring to the offensive odors of rotting organic materials, such as sewage and garbage. Yucch!
having or exercising power
The word "influential," the adjectival form of "influence," refers to people with the power to get things to flow their way.