Declension table of ?saṅku

Masculine	Singular	Dual	Plural
Nominative	saṅkuḥ	saṅkū	saṅkavaḥ
Vocative	saṅko	saṅkū	saṅkavaḥ
Accusative	saṅkum	saṅkū	saṅkūn
Instrumental	saṅkunā	saṅkubhyām	saṅkubhiḥ
Dative	saṅkave	saṅkubhyām	saṅkubhyaḥ
Ablative	saṅkoḥ	saṅkubhyām	saṅkubhyaḥ
Genitive	saṅkoḥ	saṅkvoḥ	saṅkūnām
Locative	saṅkau	saṅkvoḥ	saṅkuṣu

Compound saṅku -

Adverb -saṅku