Túrin’s camp on Amon Rûdh, translated “Camp of the Faithful” (UT/153). This name is a compound of echad “camp”, the elided plural form of i “the” and the plural sedryn of sadron “trusty follower, loyal companion”.
Sindarin
Echad i Sedryn
noun. camp of the faithful
echad i sedryn
place name. Camp of the Faithful
achad (“camp”) + in (pl. genitive article) + sedryn (pl. of sadron “faithful one”)