imponderable
Pronunciation:
/ɪmˈpɒndəɹəbl//ɪmˈpɑːndəɹəbl/noun
Definitions
An imponderable substance or body; specifically, in the plural, a name formerly applied to heat, light, electricity, and magnetism.
An imponderable question.
adjective
Definitions
Not ponderable; without sensible or appreciable weight; incapable of being weighed.
Difficult or impossible to comprehend or evaluate.