tathābhāva : [m.] suchness; such a condition.

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

de bzhin nyid kyi ngo bo

[translation-san] tathābhāva

[translation-eng] {Hopkins} entity of suchness

Jeffrey Hopkins' Tibetan-Sanskrit-English Dictionary