masc abl sg of bhūta (pp); nt abl sg of bhūta (pp); nt abl sg of bhūta (noun); masc abl sg of bhūta (noun); …
Analysis. bhūta + -to (ablative suffix); the -to ending often marks the instrumental or ablative sense 'by means of, from, in respect of'; bhūtato thus means 'from what has become, from being/reality' — used adverbially to mean 'actually, truly, in fact'.
Etymology. bhūta is the past participle of √bhū 'to become, be' (Sanskrit bhūta, English be, German bin, Latin fuī 'I was'). The ablative -to extends the spatial sense: 'away from what has become' → 'in terms of what truly is' → 'really, actually'.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
Lite mode — plain HTML for e-readers and old browsers. Full version