Antonyms of adj ponderable

2 senses of ponderable

Sense 1
ponderable (vs. imponderable) -- (capable of being weighed or considered; "something ponderable from the outer world--something of which we can say that its weight is so and so"- James Jeans)

imponderable (vs. ponderable) -- (difficult or impossible to evaluate with precision; "such imponderable human factors as aesthetic sensibility")

Sense 2
cogitable, ponderable -- (capable of being thought about; "space flight to other galaxies becomes more cogitable")

INDIRECT (VIA thinkable) -> unthinkable -- (incapable of being conceived or considered)

Similarity of adj ponderable

2 senses of ponderable

Sense 1
ponderable (vs. imponderable) -- (capable of being weighed or considered; "something ponderable from the outer world--something of which we can say that its weight is so and so"- James Jeans)
       => assessable -- (capable of being considered carefully; "the assessable qualities of art")

Sense 2
cogitable, ponderable -- (capable of being thought about; "space flight to other galaxies becomes more cogitable")
       => thinkable (vs. unthinkable) -- (capable of being conceived or imagined or considered)