Declension table of ?gartavya

Neuter	Singular	Dual	Plural
Nominative	gartavyam	gartavye	gartavyāni
Vocative	gartavya	gartavye	gartavyāni
Accusative	gartavyam	gartavye	gartavyāni
Instrumental	gartavyena	gartavyābhyām	gartavyaiḥ
Dative	gartavyāya	gartavyābhyām	gartavyebhyaḥ
Ablative	gartavyāt	gartavyābhyām	gartavyebhyaḥ
Genitive	gartavyasya	gartavyayoḥ	gartavyānām
Locative	gartavye	gartavyayoḥ	gartavyeṣu

Compound gartavya -

Adverb -gartavyam -gartavyāt