Declension table of ?āptavya

Masculine	Singular	Dual	Plural
Nominative	āptavyaḥ	āptavyau	āptavyāḥ
Vocative	āptavya	āptavyau	āptavyāḥ
Accusative	āptavyam	āptavyau	āptavyān
Instrumental	āptavyena	āptavyābhyām	āptavyaiḥ āptavyebhiḥ
Dative	āptavyāya	āptavyābhyām	āptavyebhyaḥ
Ablative	āptavyāt	āptavyābhyām	āptavyebhyaḥ
Genitive	āptavyasya	āptavyayoḥ	āptavyānām
Locative	āptavye	āptavyayoḥ	āptavyeṣu

Compound āptavya -

Adverb -āptavyam -āptavyāt