D defs.my
Entry 3 senses Webster, 1913

Ticklish

/tĭk'-əl-ĭsh/ · Tic·klish · IPA /ˈtɪk(ə)lɪʃ/
01 a. Sensible to slight touches; easily tickled; as, the sole of the foot is very ticklish; the hardened palm of the hand is not ticklish.
  1. 1.
    Sensible to slight touches; easily tickled; as, the sole of the foot is very ticklish; the hardened palm of the hand is not ticklish.
  2. 2.
    Standing so as to be liable to totter and fall at the slightest touch; unfixed; easily affected; unstable.
    “Can any man with comfort lodge in a condition so dismally ticklish?” Barrow.
  3. 3.
    Difficult; nice; critical; as, a ticklish business.
    “Surely princes had need, in tender matters and ticklish times, to beware what they say.” Bacon.