Ati-ghna, as, ī, am, Ved. very or utterly de- structive; (ī), f., Ved. a happy state of utter oblivion or profound sleep obliterating all that is disagreeable in the past.
atighnaa. Very destructive. —ghnī [atiśayena haṃti duḥkhaṃ; han-ṭhak] A happy state of complete oblivion which drowns all thought of whatever is disagreeable in the past; atighnīmānaṃdasya gatvā Bṛ. Ār. Up.
atighnaa. Very destructive. -ghnī [atiśayena hanti duḥkham; han-ṭak] A happy state of complete oblivion which drowns all thoughts of whatever is disagreeable in the past; atighnīmānandasya gatvā Bṛi. Ār. Up.2.1.9.
Böhtlingk and Roth Grosses Petersburger Wörterbuch
atighna (von han mit ati) adj. vollständig vernichtend, davon f. °ghnī, vielleicht mit Ergänzung von avasthā, ein alles Unangenehme vergessen machender Zustand: atighnīmānandasya gatvā BṚH. ĀR. UP. 2, 1, 19.