Declension table of ?astaka

Neuter	Singular	Dual	Plural
Nominative	astakam	astake	astakāni
Vocative	astaka	astake	astakāni
Accusative	astakam	astake	astakāni
Instrumental	astakena	astakābhyām	astakaiḥ
Dative	astakāya	astakābhyām	astakebhyaḥ
Ablative	astakāt	astakābhyām	astakebhyaḥ
Genitive	astakasya	astakayoḥ	astakānām
Locative	astake	astakayoḥ	astakeṣu

Compound astaka -

Adverb -astakam -astakāt