Pahāsi is 3rd singular preterit of paharati; found at Vv 29 8 (musalena = pahari Vv-a 113); and also 3rd singular preterit of pajahati, e.g. at Snp 1057 (= pajahi Nidd II under jahati)
(aor, aor of pajahati) abandoned; left behind [lit.] actively abandoned Construction: pa + √hā + si