Ichidan verb, Intransitive verb
to gush forth (e.g. water from a spring); to flow (out); to stream (out); to bubble up
地面から水が沸き出ている。The water is welling up from the ground. to well up (of tears, emotions, etc.); to flow out (of tears)
to emerge; to suddenly appear; to come forth
Also written 涌き出る【わきでる】、沸き出る【わきでる】