Declension table of ?śithira

Neuter	Singular	Dual	Plural
Nominative	śithiram	śithire	śithirāṇi
Vocative	śithira	śithire	śithirāṇi
Accusative	śithiram	śithire	śithirāṇi
Instrumental	śithireṇa	śithirābhyām	śithiraiḥ
Dative	śithirāya	śithirābhyām	śithirebhyaḥ
Ablative	śithirāt	śithirābhyām	śithirebhyaḥ
Genitive	śithirasya	śithirayoḥ	śithirāṇām
Locative	śithire	śithirayoḥ	śithireṣu

Compound śithira -

Adverb -śithiram -śithirāt