Declension table of ?mahāśaṅku

Masculine	Singular	Dual	Plural
Nominative	mahāśaṅkuḥ	mahāśaṅkū	mahāśaṅkavaḥ
Vocative	mahāśaṅko	mahāśaṅkū	mahāśaṅkavaḥ
Accusative	mahāśaṅkum	mahāśaṅkū	mahāśaṅkūn
Instrumental	mahāśaṅkunā	mahāśaṅkubhyām	mahāśaṅkubhiḥ
Dative	mahāśaṅkave	mahāśaṅkubhyām	mahāśaṅkubhyaḥ
Ablative	mahāśaṅkoḥ	mahāśaṅkubhyām	mahāśaṅkubhyaḥ
Genitive	mahāśaṅkoḥ	mahāśaṅkvoḥ	mahāśaṅkūnām
Locative	mahāśaṅkau	mahāśaṅkvoḥ	mahāśaṅkuṣu

Compound mahāśaṅku -

Adverb -mahāśaṅku