Not ponderable; without sensible or appreciable weight; incapable of being weighed.
Difficult or impossible to comprehend or evaluate.
An imponderable question.
A factor that cannot be anticipated.
An imponderable substance or body; specifically, in the plural, a name formerly applied to heat, light, electricity, and magnetism.
Existing or operating without involvement by the body; solely mental or intellectual; “ungrounded”, “heady”.
Not united in a regimented structure; lacking structure and order.
Not expressed or exhibited in material or concrete form; wholly abstract.
Not incorporated into a coherent system; conceptually disconnected.
Incorporeal; not possessed of a body.