un·der·tow 
(ŭndər-tō′)
(ŭndər-tō′)n.
1. An underwater current flowing strongly away from shore, usually caused by the seaward return of water from waves that have broken against the shore.
2. A tendency, especially in thought or feeling, contrary to what seems the strongest: "As she talks nostalgically of her days of glory ... a poignant undertow emerges" (Tina Brown).
- keel
- keelboat
- keelhaul
- Keeling Islands
- Keeling Islands
- keel over
- keelson
- Keemun
- keen
- keen
- keener
- keenly
- keenness
- keep
- keepan ear to the ground
- keep an eye on
- keep an eye out
- keep a/one's weather eye open
- keep a stiff upper lip
- keep at
- keep a weather eye open
- keep chin up
- keep company
- keep company
- keep down