[1] : The Collaborative International Dictionary of English v.0.48

undertow \un"dertow`\, n. naut.
   the current that sets seaward near the bottom when waves are
   breaking upon the shore.
   1913 webster

[2] : WordNet (r) 2.0

undertow
     n 1: an inclination contrary to the strongest or prevailing
          feeling; "his account had a poignant undertow of regret"
     2: the seaward undercurrent created after waves have broken on
        the shore syn: sea puss, sea-puss, sea purse, sea-purse,
         sea-poose
see also:
sea puss sea-puss sea purse sea-purse sea-poose 

[3] : Moby Thesaurus II by Grady Ward, 1.0

49 moby thesaurus words for "undertow":
   affluence, afflux, affluxion, concourse, confluence, conflux,
   coral heads, course, crosscurrent, current, defluxion, downflow,
   downpour, drift, driftage, flow, flowing, fluency, flux, gush,
   inflow, ironbound coast, ledges, lee shore, mill run, millrace,
   onrush, onward course, outflow, pitfall, quicksands, race,
   rockbound coast, rocks, run, rush, sandbank, sandbar, sands, set,
   shallows, shoals, spate, stream, surge, tide, trend, undercurrent,
   water flow

Undertow >> U Words
Undertow, definition of term: Undertow
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