a.

1. 滑的；容易滑的
   The road was slippery after the rain.

   下雨之后道路很滑。

2. （问题等）须小心对待的
   They are faced with slippery economic problems.

   他们面临棘手的经济问题。

3. 易滑脱的
4. 油滑的；靠不住的
   That guy is a slippery character.

   那人是一个狡猾的家伙。

5. 不稳定的；不明确的
   That is a slippery situation.

   局势很不稳定。

adj.

1. difficult to hold firmly or stand on through being smooth, wet, or slimy.
2. (of a person) evasive and unpredictable.
   ▸(of a word or concept) changing in meaning according to context or point of view.