imponderable Meaning, Definition & Usage

  1. noun a factor whose effects cannot be accurately assessed
    • human behavior depends on many imponderables
  2. adjective difficult or impossible to evaluate with precision
    • such imponderable human factors as aesthetic sensibility

WordNet

Im*pon"der*a*ble adjective
Etymology
Pref. im- not + ponderable: cf. F. impondérable.
Definitions
  1. Not ponderable; without sensible or appreciable weight; incapable of being weighed.
Im*pon"der*a*ble noun
Definitions
  1. (Physics) An imponderable substance or body; specifically, in the plural, a name formely applied to heat, light, electricity, and magnetism, regarded as subtile flyids destitute of weight but in modern science little used.

Webster 1913