undercurrent
Concise Oxford English Dictionary © 2008 Oxford University Press:
undercurrent/ˈʌndəkʌrənt/
▶noun
- 1 a current of water below the surface and moving in a different direction from any surface current.
- 2 an underlying quality or influence: there was an undercurrent of anxiety to her words.
'undercurrent' also found in these Oxford entries:

