[sem.pi.ter.nal] adj [ME, fr. LL sempiternalis, fr. L sempiternus, fr. semper ever, always, fr. sem- one, same (akin to ON samr same) + per through--more at same, for] (15c): of never-ending duration: eternal -- sem.pi.ter.nal.ly adv
SEMPITERNAL
Meaning of SEMPITERNAL in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012