As adjectives the difference between insupportable and importunable
is that insupportable is not supportable; incapable of being supported or borne; unendurable; unsupportable; insufferable; intolerable while importunable is (obsolete) heavy; insupportable.
insupportable
English
Adjective
(
en adjective)
not supportable; incapable of being supported or borne; unendurable; unsupportable; insufferable; intolerable.
Related terms
* insupportableness
* insupportably
References
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