imponderable

Meanings

1. 1
   adj

   difficult or impossible to evaluate with precision

   Such imponderable human factors as aesthetic sensibility.

2. 2
   noun

   a factor whose effects cannot be accurately assessed

   Human behavior depends on many imponderables.

3. 3
   noun

   A factor that cannot be anticipated.

   One key imponderable is the attitude of the companies that will no longer have a role in the business. It is worth noting here that several have already thrown the towel in or been gently pushed out, such as Stagecoach and National Express.

From im- + ponderable.

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