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Adjective: imponderable  im'pón-du-ru-bul
  1. Difficult or impossible to evaluate with precision
    "such imponderable human factors as aesthetic sensibility"
Noun: imponderable  im'pón-du-ru-bul
  1. A factor whose effects cannot be accurately assessed
    "human behaviour depends on many imponderables"

Derived forms: imponderables

Type of: influence

Antonym: ponderable