I / immĕmŏrābĭlis
adjective

immĕmŏrābĭlis

neut. immĕmŏrābĭle
(), in-memorabilis (ante-class.). Pass.
unmentionable; indescribable
unmentionable, indescribable = ἀδιήγητος: spurcidioi versus immemorabiles, i. e. unworthy to be mentioned, Plaut. Capt. prol. 56: spatium, Lucr. 6, 488.—*
that will not tell any thing; speechless; silent active
Act., that will not tell any thing, speechless, silent: anus, Plaut. Cist. 2, 2, 3.