Declension table of ?pitṛkarman

Neuter	Singular	Dual	Plural
Nominative	pitṛkarma	pitṛkarmaṇī	pitṛkarmāṇi
Vocative	pitṛkarman pitṛkarma	pitṛkarmaṇī	pitṛkarmāṇi
Accusative	pitṛkarma	pitṛkarmaṇī	pitṛkarmāṇi
Instrumental	pitṛkarmaṇā	pitṛkarmabhyām	pitṛkarmabhiḥ
Dative	pitṛkarmaṇe	pitṛkarmabhyām	pitṛkarmabhyaḥ
Ablative	pitṛkarmaṇaḥ	pitṛkarmabhyām	pitṛkarmabhyaḥ
Genitive	pitṛkarmaṇaḥ	pitṛkarmaṇoḥ	pitṛkarmaṇām
Locative	pitṛkarmaṇi	pitṛkarmaṇoḥ	pitṛkarmasu

Compound pitṛkarma -

Adverb -pitṛkarma -pitṛkarmam