Declension table of ?yavaśasya

Neuter	Singular	Dual	Plural
Nominative	yavaśasyam	yavaśasye	yavaśasyāni
Vocative	yavaśasya	yavaśasye	yavaśasyāni
Accusative	yavaśasyam	yavaśasye	yavaśasyāni
Instrumental	yavaśasyena	yavaśasyābhyām	yavaśasyaiḥ
Dative	yavaśasyāya	yavaśasyābhyām	yavaśasyebhyaḥ
Ablative	yavaśasyāt	yavaśasyābhyām	yavaśasyebhyaḥ
Genitive	yavaśasyasya	yavaśasyayoḥ	yavaśasyānām
Locative	yavaśasye	yavaśasyayoḥ	yavaśasyeṣu

Compound yavaśasya -

Adverb -yavaśasyam -yavaśasyāt