ppl. a. rare. [f. FOUNT1 + -ING2.] Welling up like a spring; transf. drooping in the form of a falling fountain.

1

1827.  Hood, Mids. Fairies, iii. 2.

        And there were founting springs to overflow
Their marble basins.
    Ibid., xlviii. 25.
We bend each tree in proper attitude,
And founting willows train in silvery falls;
We frame all shady roofs and arches rude,
And verdant aisles leading to Dryads’ halls,
Or deep recesses where the Echo calls.

2