संस्‍कृतशब्‍दकोशः

पर्यवस्थातृ

शत्रु, प्रतिपक्ष, अवरोद्धा, समापक,

enemy, opposite side (in a discussion), one who puts a stop to, one who brings to an end

Monier–Williams

पर्यवस्थातृ — {pary-ava-sthātṛ} mfn. opposing##an antagonist, adversary MBh. Pāṇ. 5-2, 89