deathlessness: amata (q.v.).

Buddhist Dictionary, Manual of Buddhist Terms and Doctrines, by NYANATILOKA MAHATHERA

deathlessness : (nt.) amatapada.

A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]

amata: (Sanskrit amṛta; Pāḷi root mar to die; = Gr. ambrosia): 'Deathlessness' according to popular belief also the gods' drink conferring immortality, is a name for Nibbāna (s. Nibbāna), the final liberation from the wheel of rebirths, and therefore also from the ever-repeated deaths.

Buddhist Dictionary, Manual of Buddhist Terms and Doctrines, by NYANATILOKA MAHATHERA