If the presentation of the water results in either no increase or a decrease in the tendency to say “water,” then the scenario lacks the second defining feature and is not an example of any kind of reinforcement.
A stimulus change that has the following features:
It occurs after a response has been emitted
It increases the future probability of that response
It results from the action of another individual
Formal and dynamic features of the response
Formal and dynamic features of the controlling variable
Whether or not the current response is reinforced
The “meaning” of either the stimulus or the response