Lewis Short
subter-lābor, lābi
* V. dep. n.
* Lit., to glide or flow under (mostly poet.): fluctus Sicanos,Verg. E. 10, 4: flumina subterlabentia muros,flowing close by,id. G. 2, 157: subterlabens Mosella,Aus. Idyll. 10, 21.
* Transf., to slip away, escape: celeritate subterlabentem,Liv. 30, 25 (dub.).
Charlton T. Lewis, Charles Short, A Latin Dictionary