Antonyms of adj proportionable

1 sense of proportionable

Sense 1
proportionable -- (proportionate)

INDIRECT (VIA proportionate) -> disproportionate, disproportional -- (out of proportion)

Similarity of adj proportionable

1 sense of proportionable

Sense 1
proportionable -- (proportionate)
       => proportionate (vs. disproportionate) -- (being in due proportion; "proportionate representation of a minority group")