Declension table of ?anantvas

Masculine	Singular	Dual	Plural
Nominative	anantvān	anantvāṃsau	anantvāṃsaḥ
Vocative	anantvan	anantvāṃsau	anantvāṃsaḥ
Accusative	anantvāṃsam	anantvāṃsau	anantuṣaḥ
Instrumental	anantuṣā	anantvadbhyām	anantvadbhiḥ
Dative	anantuṣe	anantvadbhyām	anantvadbhyaḥ
Ablative	anantuṣaḥ	anantvadbhyām	anantvadbhyaḥ
Genitive	anantuṣaḥ	anantuṣoḥ	anantuṣām
Locative	anantuṣi	anantuṣoḥ	anantvatsu

Compound anantvat -

Adverb -anantvas