Declension table of niś

Feminine	Singular	Dual	Plural
Nominative
Vocative
Accusative			niśaḥ
Instrumental	niśā	nigbhyām	nigbhiḥ
Dative	niśe	nigbhyām	nigbhyaḥ
Ablative	niśaḥ	nigbhyām	nigbhyaḥ
Genitive	niśaḥ	niśoḥ	niśām
Locative	niśi	niśoḥ	nikṣu

Compound niṭ -

Adverb -niṭ