Noun undertow has 2 senses
  1. undertow - an inclination contrary to the strongest or prevailing feeling; "his account had a poignant undertow of regret"
    --1 is a kind of
    inclination
  2. undertow, sea puss, sea-puss, sea purse, sea-purse, sea-poose - the seaward undercurrent created after waves have broken on the shore
    --2 is a kind of undertide, undercurrent
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