0 a strong current flowing underwater in a different direction to the way the water on the surface is moving, especially one that flows away from the land at the same time as a wave hits the beach -- 水下逆流；（尤指）退浪，回卷
Against that powerful undertow nothing could make headway.
Undertow spends about twelve years being a small fish, for which he is bitter.
Despite those difficulties, there is a positive undertow, and a wish on all sides that it should succeed.
The coast is a sandy bottom beach break which can sometimes feature rip tides and an undertow.
It is one of the most extensive of the beaches in this area with fine, white sand gentle waves and little undertow.
The waters of the bay have little wave action or undertow and are warm year-round.
It has a deep emotional undertow and the general sense is that justice should be done to all parties.
Bereavement, loneliness, disappointment and the search for happiness, number amongst his themes, and the melancholy undertow is offset by firm faith in divine providence.
