to go over, i.e. to overcome, surmount, conquer, get the better of, only in pret. (aor. 3^rd sg. accagā (q.v. and see gacchati 3) Snp.1040; Dhp.414 and accagamā (see gacchati 2) Vin.ii.192; DN.i.85; SN.ii.205; DN-a.i.236 (= abhibhavitvā pavatta). Also 3^rd pl accaguṃ Iti.93, Iti.95.

ati + gacchati