Declension table of ?ṣṭhīvat

Masculine	Singular	Dual	Plural
Nominative	ṣṭhīvan	ṣṭhīvantau	ṣṭhīvantaḥ
Vocative	ṣṭhīvan	ṣṭhīvantau	ṣṭhīvantaḥ
Accusative	ṣṭhīvantam	ṣṭhīvantau	ṣṭhīvataḥ
Instrumental	ṣṭhīvatā	ṣṭhīvadbhyām	ṣṭhīvadbhiḥ
Dative	ṣṭhīvate	ṣṭhīvadbhyām	ṣṭhīvadbhyaḥ
Ablative	ṣṭhīvataḥ	ṣṭhīvadbhyām	ṣṭhīvadbhyaḥ
Genitive	ṣṭhīvataḥ	ṣṭhīvatoḥ	ṣṭhīvatām
Locative	ṣṭhīvati	ṣṭhīvatoḥ	ṣṭhīvatsu

Compound ṣṭhīvat -

Adverb -ṣṭhīvantam