boiled up, boiling, seething AN.iii.231 & AN.iii.234 (udapatto agginā santatto ukkaṭṭhito, variant reading ukkuṭṭhito); Ja.iv.118 (variant reading pakkudhita = pakkuṭhita, as gloss).

for ukkaṭhita, ud + pp. of kvath, see kaṭhati & kuthati