slip·pery /ˈslɪp(ə)ri/
 (a.)滑的,光滑的,靠不住的,圓滑的,不穩固的,含糊的


 Slip·per·y a.
 1. 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.
 2. Not affording firm ground for confidence; as, a slippery promise.
    The slippery tops of human state.   --Cowley.
 3. Not easily held; liable or apt to slip away.
    The slippery god will try to loose his hold.   --Dryden.
 4. Liable to slip; not standing firm.
 5. Unstable; changeable; mutable; uncertain; inconstant; fickle. “The slippery state of kings.”
 6. Uncertain in effect.
 7. Wanton; unchaste; loose in morals.
 Slippery elm. Bot. (a) An American tree (Ulmus fulva) with a mucilagenous and slightly aromatic inner bark which is sometimes used medicinally; also, the inner bark itself. (b) A malvaceous shrub (Fremontia Californica); -- so called on the Pacific coast.

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 slippery
      adj 1: being such as to cause things to slip or slide; "slippery
             sidewalks"; "a slippery bar of soap"; "the streets are
             still slippy from the rain" [syn: slippy] [ant: nonslippery]
      2: not to be trusted; "how extraordinarily slippery a liar the
         camera is"- James Agee; "they called Reagan the teflon
         president because mud never stuck to him" [syn: tricky,
         teflon]