idem.
the same
Meaning & usage
the same
Where this word comes from
From Proto-Italic *izdim; equivalent to is (“he”) + Proto-Italic *-im (emphatic marker) (whence Sabellic *-om, Oscan 𐌝𐌔𐌝𐌃𐌖𐌌 (ísídum), 𐌄𐌔𐌝𐌃𐌖𐌌 (esídum)), from Proto-Indo-European *im (whence also Old Latin im, em), accusative singular of *éy (so both parts are from the same source). The s was lost and the i lengthened by compensatory lengthening. When is' ablative cases eōd, eād became eō, eā, idem's ablative true forms eōd-em, eād-em were interpreted as eō-dem, eā-dem. The neuter nominative singular id-em is natural. De verborum significatione gives emem as a form of the later eundem.http://remacle.org/bloodwolf/erudits/Festus/e.htm The new marker -dem then served to create totidem, tantundem, ibīdem, etc. Compare tam-en with its later doublet: tan-dem (← *tam-dem).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.