hy·po·sen·si·tiv·i·ty 
(hī′pō-sĕn′sĭ-tĭvĭ-tē)
(hī′pō-sĕn′sĭ-tĭvĭ-tē)n. pl. hy·po·sen·si·tiv·i·ties
Less than the normal ability to respond to stimuli.
hy′po·sensi·tive adj.
- 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
- keep end up
- keeper
- keep eyes open
- keep eyes peeled
- keep fingers crossed
- keep head
- keep/hold (one's) peace
- keeping