insoutenable
unbearable, unsustainable
adjective an-soo-tuh-NAHBL Rare
Also means
untenable
Usage Note
Insoutenable is used for situations too intense or painful to endure (une douleur insoutenable) and also for arguments that cannot logically be maintained (une thèse insoutenable). It is the negation of soutenable (bearable, defensible). The word is invariable in gender.
Examples
"La chaleur était insoutenable."
Natural Translation
The heat was unbearable.

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