Antonyms of adj curable

2 senses of curable

Sense 1
curable (vs. incurable) -- (curing or healing is possible; "curable diseases")

incurable (vs. curable) -- (incapable of being cured; "an incurable disease"; "an incurable addiction to smoking")

Sense 2
curable -- (capable of being hardened by some additive or other agent)

INDIRECT (VIA tempered) -> untempered, unhardened -- (not brought to a proper consistency or hardness; "untempered mortar"; "untempered steel")

Similarity of adj curable

2 senses of curable

Sense 1
curable (vs. incurable) -- (curing or healing is possible; "curable diseases")

Sense 2
curable -- (capable of being hardened by some additive or other agent)
       => tempered (vs. untempered), treated, hardened, toughened -- (made hard or flexible or resilient especially by heat treatment; "a sword of tempered steel"; "tempered glass")

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