eternal (adj.)youdaoicibaDictYouDict
late 14c., from Old French eternel "eternal," or directly from Late Latin aeternalis, from Latin aeternus "of an age, lasting, enduring, permanent, everlasting, endless," contraction of aeviternus "of great age," from aevum "age" (see eon). Used since Middle English both of things or conditions without beginning or end and things with a beginning only but no end. A parallel form, Middle English eterne, is from Old French eterne (cognate with Spanish eterno), directly from Latin aeternus. Related: Eternally. The Eternal (n.) for "God" is attested from 1580s.
gamin (n.)youdaoicibaDictYouDict
"street urchin," 1837, from French gamin (late 18c.), perhaps from Berrichon dialect gamer "to steal." Introduced in English in translations of Hugo.
Un groupe d'enfants, de ces petits sauvages vanu-pieds qui ont de tout temps battu le pavé de Paris sous le nom éternel de gamins, et qui, lorsque nous étions enfants aussi, nous ont jeté des pierres à tous, le soir, au sortir de classe, parce que nos pantalons n'étaient pas déchirés; etc. [Hugo, "Notre-Dame de Paris"]