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from Wiktionary, Creative Commons Attribution/Share-Alike License

  • v. To leap up; spring up.

from The Century Dictionary and Cyclopedia

  • To leap up; spring up. William of Palerne (E. E. T. S.), l. 3283.


From Middle English uplepen, equivalent to up- +‎ leap. Cognate with Dutch oplopen ("to incur, run up"), German auflaufen ("to accumulate, mount up, run aground"). (Wiktionary)



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