ἀτέρμων

ον, ονος
A. without bound or end, αἰών Arist. Mu. 401a16; ὕπνος Mosch. 3.104; ἐνόπτρων ἀ. αὐγαί the mirror's countless rays, E. Hec. 926; ἀ. πέπλος having no end or issue, inextricable, A. Eu. 634.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project