Declension table of ?apavyavastha

Neuter	Singular	Dual	Plural
Nominative	apavyavastham	apavyavasthe	apavyavasthāni
Vocative	apavyavastha	apavyavasthe	apavyavasthāni
Accusative	apavyavastham	apavyavasthe	apavyavasthāni
Instrumental	apavyavasthena	apavyavasthābhyām	apavyavasthaiḥ
Dative	apavyavasthāya	apavyavasthābhyām	apavyavasthebhyaḥ
Ablative	apavyavasthāt	apavyavasthābhyām	apavyavasthebhyaḥ
Genitive	apavyavasthasya	apavyavasthayoḥ	apavyavasthānām
Locative	apavyavasthe	apavyavasthayoḥ	apavyavastheṣu

Compound apavyavastha -

Adverb -apavyavastham -apavyavasthāt