aⁿ.trüvȧbl( ə ), -b(lə) adjective
Etymology: French, from in- in- (I) + trouvable capable of being found, from Middle French, from trouver to find (probably from — assumed — Vulgar Latin tropare to compose) + -able — more at troubadour
: impossible to find
pamphlets, all now almost introuvable — Times Literary Supplement
• in·trou·va·bly ə̇n.ˈtrüvəblē adverb