Difficult or impossible to comprehend or evaluate.
Not ponderable; without sensible or appreciable weight; incapable of being weighed.
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.
Esoteric.
Related to the occult; pertaining to mysticism, magic, or astrology.
Secret; hidden from general knowledge; undetected.
To dissimulate, conceal, or obfuscate.
To cover or hide from view.
Supernatural affairs.