Lewis & Short

sur-rādo (subr-), si, sum, 3, v. a., to scrape below.

  1. I. Lit. (ante- and postclass.): ficos, Cato, R. R. 50: arborem, Pall. Apr. 4.
  2. * II. Transf., of a river, to run close under, to flow along or past: barbaros fines, Amm. 28, 2, 1.