idem
idem, éadem, idem
pronoun
i-dem · /ˈi.dɛm/
the same
It is the pronoun is with the ending -dem; before d the m turns to n (eúndem).
in the texts
Súscipe, sancta Trínitas eúndem
Unde et mémores eiúsdem
Súpplices te rogámus eúndem
Meménto étiam (pro defúnctis) eúndem
Líbera nos eúndem
Dómine Iesu Christe, Fili Dei vivi eódem
Deus, refúgium nostrum eúndem
external dictionary: Logeion