A coil that returns to its shape after being pushed. Also the season of return, and a source of water rising.
Old English springan (to leap, to burst forth), from Proto-Germanic *sprengan; a single root gives the coil that returns, the season plants return in, and the water that rises unbidden.
A shape that returns to itself after being pushed, the season of return, and the water that rises from a source. Three things joined by one old word for bursting forth.