refluent
adjective
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Refluent was first documented in English during the 15th century, and it can be traced back to the Latin verb refluere, meaning "to flow back." "Refluere," in turn, was formed from the prefix re- and the verb "fluere" ("to flow"). Other "fluere" descendants in English include "confluent" ("flowing together"), "fluent" and "fluid" (both of which share the earliest sense of "flowing easily"), "circumfluent" ("flowing around"), and even "affluent" (which first meant "flowing abundantly"). "Refluent" even has an antonym derived from "fluere" - effluent, meaning "flowing out."
Word History
Middle English, from Latin refluent-, refluens, present participle of refluere to flow back, from re- + fluere to flow — more at fluid
15th century, in the meaning defined above