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upleap

vb. (context intransitive English) To leap up; spring up.

Usage examples of "upleap".

Kane clubbed his musket and smashed down into the red-eyed faces, knocking aside the upleaping hands.

His appearance was like the upleaping of a Jack-in-the-box at the touch of the spring, but the explanation was evident: he was making his way down the gorge from above, when his leap from one rock to another brought him thus abruptly into view.