infinitive (santāpetuṁ) of the causative santāpeti, from √tap 'to burn'; surface form shows sandhi contraction and pāli nominalization
Analysis. sam + √tap + causative suffix -eti; saṁ 'together' + tap 'burn' = 'burn together', intensified to 'burn inwardly, torment'. The causative -eti makes it 'cause to burn/torment'.
Etymology. √tap (Sanskrit √tap, cognate with English 'tepid', Latin 'tepēre' 'to be warm') originally means 'to heat'; the prefix saṁ 'together' intensifies the root sense inward, yielding the metaphorical meaning 'to cause inner burning, to torment'. The causative voice adds 'cause to suffer'.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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