Declension table of ?sevana

Neuter	Singular	Dual	Plural
Nominative	sevanam	sevane	sevanāni
Vocative	sevana	sevane	sevanāni
Accusative	sevanam	sevane	sevanāni
Instrumental	sevanena	sevanābhyām	sevanaiḥ
Dative	sevanāya	sevanābhyām	sevanebhyaḥ
Ablative	sevanāt	sevanābhyām	sevanebhyaḥ
Genitive	sevanasya	sevanayoḥ	sevanānām
Locative	sevane	sevanayoḥ	sevaneṣu

Compound sevana -

Adverb -sevanam -sevanāt