idem

Meaning

the same

Concepts

ego

same

self

the same

too

Synonyms

īdem

etiam

quoque

et

item

eadem

et quidem

Translations

mateix

meteis

stesso

el mismo

derselbe

même

també

نَفْسَهَا

أَيْضًا

auch

Ego

selbe

Selbst

Ich

نَفْسَهُ

Pronounced as (IPA)

[ˈiː.dẽː]

Etymology

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).