accusative neuter singular of puttapasu (compound noun), with -sammattaṁ suffix forming a locative/instrumental adverbial phrase meaning 'in the manner of cattle and children'
Analysis. putta (child, son) + pasu (beast, cattle) + sammattaṁ (in the manner of, according to); the phrase occurs in the canon describing those who act without discrimination or wisdom, like animals or small children.
Etymology. putta is the neuter form of putta (boy, son), from √pad (foot), cognate with Sanskrit putra and possibly English 'foot' (those who follow at one's feet); pasu (cattle, beast) is from the same root as Sanskrit paśu (animal), from √paś (to see, watch), referring originally to creatures watched over; sammattaṁ (in the manner of) is from sam- (together, thoroughly) + √mat (to measure, consider), meaning 'measured together, proportioned, fitting'.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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