Declension table of ?gamyatva

Neuter	Singular	Dual	Plural
Nominative	gamyatvam	gamyatve	gamyatvāni
Vocative	gamyatva	gamyatve	gamyatvāni
Accusative	gamyatvam	gamyatve	gamyatvāni
Instrumental	gamyatvena	gamyatvābhyām	gamyatvaiḥ
Dative	gamyatvāya	gamyatvābhyām	gamyatvebhyaḥ
Ablative	gamyatvāt	gamyatvābhyām	gamyatvebhyaḥ
Genitive	gamyatvasya	gamyatvayoḥ	gamyatvānām
Locative	gamyatve	gamyatvayoḥ	gamyatveṣu

Compound gamyatva -

Adverb -gamyatvam -gamyatvāt