pakkaṭhati

to cook, boil up; only in Caus. ii. pakkaṭṭhāpeti (with unexplained ṭṭh for ṭh to cause to be boiled up Ja.i.472 (variant reading pakkuṭṭh˚, cp J.P.T.S. 1884, 84)
pp pakkaṭhita (q.v.). Pakkathita (pakkuthita)

pa + kaṭhati of kvath