Ticklish

1. a. Difficult; nice; critical; as, a ticklish business.
2. 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.
3. a. Standing so as to be liable to totter and fall at the slightest touch; unfixed; easily affected; unstable.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.