verb

• (transitive) To pull or tow under; drag beneath; pull down.
  "Off in a gallop the General wheeled vanishing, And sped his steed away into the blue, When Lineoln now alone let go his speech Which had before been undertowed by force, [...]"
• (transitive) To pull down by, or as by, an undertow.
  "A sense that the air, a sighting of muddy river, or that outcrop of rock so implacably bland in the light of midday, is undertowed by memory."
• (intransitive) To flow or behave as an undertow.
  "Everybody knows this and acts accordingly; but when you say it, it sounds bad and bold, and makes you uncomfortable to hear it, because the puritan blood is still undertowing in your veins."

noun

• (by extension) A feeling that runs contrary to one's normal one.