prayāja and anuyāja are irregularly formed with ghañ when meaning 'a portion of a sacrificial offering'.,
These words are derived from यज् with घञ् without the guttural substitution; as पञ्च प्रयाजाः, त्रयोनुयाजाः, त्वमग्ने प्रयाजाना पश्चात् त्वं पुरुस्तात् ॥ But प्रयागः and अनुयागः when not referring to portions of a sacrifice. The प्रयाज and अनुयाज are illustrative only. The guttural change does not take place with other prepositions &c. also, as उपयाजः, उपांशुयाजः, संयाजः, ऋतुयाजः, as in the sentences एकादशोपयाजाः, उपांशु याजमन्तरा यजति, अष्टो पत्नी संयाजा भवन्ति, ऋतुयाजैश्चरन्ति ॥,