Declension table of ?puruṣārthasiddhyupāya

Masculine	Singular	Dual	Plural
Nominative	puruṣārthasiddhyupāyaḥ	puruṣārthasiddhyupāyau	puruṣārthasiddhyupāyāḥ
Vocative	puruṣārthasiddhyupāya	puruṣārthasiddhyupāyau	puruṣārthasiddhyupāyāḥ
Accusative	puruṣārthasiddhyupāyam	puruṣārthasiddhyupāyau	puruṣārthasiddhyupāyān
Instrumental	puruṣārthasiddhyupāyena	puruṣārthasiddhyupāyābhyām	puruṣārthasiddhyupāyaiḥ puruṣārthasiddhyupāyebhiḥ
Dative	puruṣārthasiddhyupāyāya	puruṣārthasiddhyupāyābhyām	puruṣārthasiddhyupāyebhyaḥ
Ablative	puruṣārthasiddhyupāyāt	puruṣārthasiddhyupāyābhyām	puruṣārthasiddhyupāyebhyaḥ
Genitive	puruṣārthasiddhyupāyasya	puruṣārthasiddhyupāyayoḥ	puruṣārthasiddhyupāyānām
Locative	puruṣārthasiddhyupāye	puruṣārthasiddhyupāyayoḥ	puruṣārthasiddhyupāyeṣu

Compound puruṣārthasiddhyupāya -

Adverb -puruṣārthasiddhyupāyam -puruṣārthasiddhyupāyāt