Declension table of ?amastaka

Masculine	Singular	Dual	Plural
Nominative	amastakaḥ	amastakau	amastakāḥ
Vocative	amastaka	amastakau	amastakāḥ
Accusative	amastakam	amastakau	amastakān
Instrumental	amastakena	amastakābhyām	amastakaiḥ amastakebhiḥ
Dative	amastakāya	amastakābhyām	amastakebhyaḥ
Ablative	amastakāt	amastakābhyām	amastakebhyaḥ
Genitive	amastakasya	amastakayoḥ	amastakānām
Locative	amastake	amastakayoḥ	amastakeṣu

Compound amastaka -

Adverb -amastakam -amastakāt