indeclinable
Analysis. sabba- (all, every) + -ttha (locative/ablative suffix, originally indicating place or relation); a frozen case form meaning 'in all places/ways/respects'. The suffix -ttha is cognate with Sanskrit -stha and related to the root √sthā 'stand' (English 'stead', 'steadfast'), originally denoting location or position.
Etymology. From sabba 'all, every' (from Proto-Indo-European *sol- 'whole', cognate with Latin solidus, English 'sole') + locative/ablative -ttha suffix (from √sthā 'stand', cognate with English 'stead', Latin stāre). The spatial sense of 'standing in' or 'being at' all places/ways has generalized to mean 'in every respect, entirely'.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
Lite mode — plain HTML for e-readers and old browsers. Full version