precarious adj

L. precāri-us, obtained by entreaty, depending on the favor of another, uncertain.

  1. Uncertain; timid; tentative; doubtful; hesitating; halting; [fig.] unsteady; wavering.
  2. Insecure; unguaranteed; vulnerable; subject to the desires of a superior; held for an uncertain period of time; liable to be taken away at the pleasure of another; [fig.] temporary; fleeting; borrowed; loaned.
  3. At risk; [fig.] fallible; mortal; finite; perishable; temporal; subject to death.