Antonyms of adj foldable

1 sense of foldable

Sense 1
foldable, foldaway, folding (prenominal) -- (capable of being folded up and stored; "a foldaway bed")

INDIRECT (VIA collapsible) -> noncollapsible, noncollapsable -- (not capable of collapsing)

Similarity of adj foldable

1 sense of foldable

Sense 1
foldable, foldaway, folding (prenominal) -- (capable of being folded up and stored; "a foldaway bed")
       => collapsible (vs. noncollapsible), collapsable -- (capable of collapsing or being collapsed; "a collapsible boat")