湧

to well (up)

welling of water

to feel that something is true or actually happening

output

(appearing) out of nowhere

hydrothermal discharge zone

to gush out

to gush forth (e.g. water from a spring)

spring water

to boil up

to appear suddenly

gushing out

those who seek riches will find them

upwelling

to happen suddenly

to tingle with excitement

bubbling spring

welling (up)

to breed (e.g. maggots)