introuvable

adjective

in·​trou·​va·​ble

aⁿ‧trüvȧbl(ᵊ),

-b(lə)

: impossible to find

pamphlets, all now almost introuvable

—Times Literary Supplement

introuvably

ə̇n‧ˈtrüvəblē

adverb

Word History

Etymology

French, from in- in- entry 1 + trouvable capable of being found, from Middle French, from trouver to find (probably from—assumed—Vulgar Latin tropare to compose) + -able

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