sus·pen·sive /səˈspɛn(t)sɪv/
 (a.)未決定的,可疑的,曖昧的,暫停的,懸而不決的


 Sus·pen·sive a.  Tending to suspend, or to keep in suspense; causing interruption or delay; uncertain; doubtful. “In suspensive thoughts.” --Beaumont. “A suspensive veto.” --Macaulay.
    The provisional and suspensive attitude.   --J. Morley.
 Suspensive condition Scots Law, a condition precedent, or a condition without the performance of which the contract can not be completed.

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 suspensive
      adj 1: (of a situation) characterized by or causing suspense [syn:
             cliff-hanging, suspenseful, nail-biting]
      2: undecided or characterized by indecisiveness