3rd person singular present indicative; surface form tacchatīti is tacchati + iti (quotation marker)
Analysis. tacchati + iti: the verb tacchati (3rd sg. pres.) followed by the particle iti, which marks reported speech or a quoted statement; literally 'he/she/it planes—thus', used to introduce or frame a saying.
Etymology. The root √tac means to strike, cut, or plane (as in woodwork); cognate with Sanskrit tacchati (carpenter's work), Greek tassō 'arrange, put in order' (from sense of striking/placing into line), and English thatch (from root sense of striking/laying out material). The sense moves from the concrete action of the carpenter's chisel striking wood to the abstract notion of arranging or ordering.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
Lite mode — plain HTML for e-readers and old browsers. Full version