Declension table of ?sampakva

Neuter	Singular	Dual	Plural
Nominative	sampakvam	sampakve	sampakvāni
Vocative	sampakva	sampakve	sampakvāni
Accusative	sampakvam	sampakve	sampakvāni
Instrumental	sampakvena	sampakvābhyām	sampakvaiḥ
Dative	sampakvāya	sampakvābhyām	sampakvebhyaḥ
Ablative	sampakvāt	sampakvābhyām	sampakvebhyaḥ
Genitive	sampakvasya	sampakvayoḥ	sampakvānām
Locative	sampakve	sampakvayoḥ	sampakveṣu

Compound sampakva -

Adverb -sampakvam -sampakvāt