to laugh, giggle Ja.v.452 (ūhasati +). See also pahassati & pahāsati
pp pahasita (q.v.).

pa + has

in pahāsanto saparisaṃ at Thag-a.69 should preferably be read as pahāsayanto parisaṃ, thus taken as Caus. of pa + has, i.e. making one smile, gladdening.

laughing, smiling, joyful, pleased Mil.297; Ja.i.411 (nicca˚ mukha), Ja.ii.179.

pp. of pahasati or ˚hassati

…is derived fr. pres. pahasati which makes the equation pahassati = pahaṃsati² all the more likely.

pa +…

…Vv-a.279 (˚mukha SS pahasita at Mil.297 is better to be taken as pp. of pahasati, because of combination haṭṭha…

to make laugh, to gladden, to make joyful Vism.289 (cittaṃ pamodeti hāseti pahāseti).

Caus. of pahasati

to laugh at, deride, mock AN.iii.91; Ja.v.452 (+ pahasati); Pp.67 (= avahasati Pp-a.249).

either ud or ava + has, cp. avahasati