past participle (masculine nominative singular) of cātuyāmasaṁvarasaṁvarati; or adjective meaning 'bound by the fourfold night precept'
Analysis. cātu-yāma-saṁvara-saṁvuta: cātu ('four') + yāma ('watch, period of night') + saṁvara ('restraint, precept', from sam + √vṛ 'to cover/restrain') + saṁvuta (past participle of saṁvarati 'is bound by, observes', sam + √vṛ). The compound refers to observance of the extended precepts during the four watches of the night, intensifying standard uposatha practice.
Etymology. saṁvara and saṁvuta derive from sam- (together, completely) + √vṛ (to cover, restrain, bind), cognate with Latin vir- (turn, twist), Sanskrit vṛṇoti (chooses, turns). The spatial sense 'covering together' → 'binding, restraint'; yāma from √yam (to hold, restrain), cognate with Sanskrit yama and English yoke.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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