Declension table of ?goptavya

Neuter	Singular	Dual	Plural
Nominative	goptavyam	goptavye	goptavyāni
Vocative	goptavya	goptavye	goptavyāni
Accusative	goptavyam	goptavye	goptavyāni
Instrumental	goptavyena	goptavyābhyām	goptavyaiḥ
Dative	goptavyāya	goptavyābhyām	goptavyebhyaḥ
Ablative	goptavyāt	goptavyābhyām	goptavyebhyaḥ
Genitive	goptavyasya	goptavyayoḥ	goptavyānām
Locative	goptavye	goptavyayoḥ	goptavyeṣu

Compound goptavya -

Adverb -goptavyam -goptavyāt