undercurrent

1. A current of water which flows under the surface, and often in a different direction from surface currents.

   Unterströmung

   подводное течениеpodvodnoje tečenije

   a current below the surface of a fluid

2. (переносно)A tendency of feeling or opinion that is concealed rather than exposed.

   The meeting was pervaded with an undercurrent of dread, as the managers tried not to admit that firings were looming.

   Unterton, Beigeschmack

1. There's a strong undercurrent here.

   Здесь сильное подводное течение.

   deHier gibt es eine starke Unterwasserströmung.

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2. There was an undercurrent of tension in the room.

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3. Don't go in the water, since there's a huge undercurrent today.

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правильный