Declension table of ?vihasana

Neuter	Singular	Dual	Plural
Nominative	vihasanam	vihasane	vihasanāni
Vocative	vihasana	vihasane	vihasanāni
Accusative	vihasanam	vihasane	vihasanāni
Instrumental	vihasanena	vihasanābhyām	vihasanaiḥ
Dative	vihasanāya	vihasanābhyām	vihasanebhyaḥ
Ablative	vihasanāt	vihasanābhyām	vihasanebhyaḥ
Genitive	vihasanasya	vihasanayoḥ	vihasanānām
Locative	vihasane	vihasanayoḥ	vihasaneṣu

Compound vihasana -

Adverb -vihasanam -vihasanāt