Declension table of ?astaka

Masculine	Singular	Dual	Plural
Nominative	astakaḥ	astakau	astakāḥ
Vocative	astaka	astakau	astakāḥ
Accusative	astakam	astakau	astakān
Instrumental	astakena	astakābhyām	astakaiḥ astakebhiḥ
Dative	astakāya	astakābhyām	astakebhyaḥ
Ablative	astakāt	astakābhyām	astakebhyaḥ
Genitive	astakasya	astakayoḥ	astakānām
Locative	astake	astakayoḥ	astakeṣu

Compound astaka -

Adverb -astakam -astakāt