Declension table of ?gacchayamāna

Neuter	Singular	Dual	Plural
Nominative	gacchayamānam	gacchayamāne	gacchayamānāni
Vocative	gacchayamāna	gacchayamāne	gacchayamānāni
Accusative	gacchayamānam	gacchayamāne	gacchayamānāni
Instrumental	gacchayamānena	gacchayamānābhyām	gacchayamānaiḥ
Dative	gacchayamānāya	gacchayamānābhyām	gacchayamānebhyaḥ
Ablative	gacchayamānāt	gacchayamānābhyām	gacchayamānebhyaḥ
Genitive	gacchayamānasya	gacchayamānayoḥ	gacchayamānānām
Locative	gacchayamāne	gacchayamānayoḥ	gacchayamāneṣu

Compound gacchayamāna -

Adverb -gacchayamānam -gacchayamānāt