The expected active participle contains a weak final consonant. After the relevant changes, the indefinite masculine singular nominative/genitive is دَاعٍ, “caller / one who invites.”
FormActive participle
واحد مذکردَاعٍ
تثنیہ مذکردَاعِيَانِ
جمع مذکردَاعُونَ
واحد مؤنثدَاعِيَةٌ
تثنیہ مؤنثدَاعِيَتَانِ
جمع مؤنثدَاعِيَاتٌ
Important qualification: دَاعٍ is the indefinite masculine singular form in the nominative/genitive. In accusative or definite use, compare دَاعِيًا and الدَّاعِي. دَاعُونَ is masculine plural; دَاعِيَاتٌ feminine plural.