Antonyms of noun efflux

1 sense of efflux

Sense 1
outflow, effluence, efflux -- (the process of flowing out)
       Antonym of influx (Sense 1)
      => inflow, influx -- (the process of flowing in)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun efflux

1 sense of efflux

Sense 1
outflow, effluence, efflux -- (the process of flowing out)
       => flow -- (any uninterrupted stream or discharge)