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French word surmenage comes from French -age, French surmener (To overwork.)
-age (French)
(rare) Forming collective nouns.. Forming nouns with the sense of "action or result of Xing" or, more rarely, "action related to X".. Forming nouns with the sense of "state of being (a) X".
surmener (French)
To overwork.
surmenage (French)
Overwork.