Slippery

1. a. Wanton; unchaste; loose in morals.
2. a. Having the quality opposite to adhesiveness; allowing or causing anything to slip or move smoothly, rapidly, and easily upon the surface; smooth; glib; as, oily substances render things slippery.
3. a. Not affording firm ground for confidence; as, a slippery promise.
4. a. Not easily held; liable or apt to slip away.
5. a. Liable to slip; not standing firm.
6. a. Unstable; changeable; mutable; uncertain; inconstant; fickle.
7. a. Uncertain in effect.

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.