Declension table of ?sāyujyatva

Neuter	Singular	Dual	Plural
Nominative	sāyujyatvam	sāyujyatve	sāyujyatvāni
Vocative	sāyujyatva	sāyujyatve	sāyujyatvāni
Accusative	sāyujyatvam	sāyujyatve	sāyujyatvāni
Instrumental	sāyujyatvena	sāyujyatvābhyām	sāyujyatvaiḥ
Dative	sāyujyatvāya	sāyujyatvābhyām	sāyujyatvebhyaḥ
Ablative	sāyujyatvāt	sāyujyatvābhyām	sāyujyatvebhyaḥ
Genitive	sāyujyatvasya	sāyujyatvayoḥ	sāyujyatvānām
Locative	sāyujyatve	sāyujyatvayoḥ	sāyujyatveṣu

Compound sāyujyatva -

Adverb -sāyujyatvam -sāyujyatvāt