Declension table of ?avastha

Masculine	Singular	Dual	Plural
Nominative	avasthaḥ	avasthau	avasthāḥ
Vocative	avastha	avasthau	avasthāḥ
Accusative	avastham	avasthau	avasthān
Instrumental	avasthena	avasthābhyām	avasthaiḥ avasthebhiḥ
Dative	avasthāya	avasthābhyām	avasthebhyaḥ
Ablative	avasthāt	avasthābhyām	avasthebhyaḥ
Genitive	avasthasya	avasthayoḥ	avasthānām
Locative	avasthe	avasthayoḥ	avastheṣu

Compound avastha -

Adverb -avastham -avasthāt