undercurrent , n : A current of water which flows under the surface, and often in a different direction from surface currents. (figuratively) A tendency of feeling or opinion that is concealed rather than exposed.
Cibo e viaggi / Food and travel notes by Livio Acerbo

undercurrent , n : A current of water which flows under the surface, and often in a different direction from surface currents. (figuratively) A tendency of feeling or opinion that is concealed rather than exposed.