Declension table of ?gurusthira

Neuter	Singular	Dual	Plural
Nominative	gurusthiram	gurusthire	gurusthirāṇi
Vocative	gurusthira	gurusthire	gurusthirāṇi
Accusative	gurusthiram	gurusthire	gurusthirāṇi
Instrumental	gurusthireṇa	gurusthirābhyām	gurusthiraiḥ
Dative	gurusthirāya	gurusthirābhyām	gurusthirebhyaḥ
Ablative	gurusthirāt	gurusthirābhyām	gurusthirebhyaḥ
Genitive	gurusthirasya	gurusthirayoḥ	gurusthirāṇām
Locative	gurusthire	gurusthirayoḥ	gurusthireṣu

Compound gurusthira -

Adverb -gurusthiram -gurusthirāt