Declension table of ?aptu

Neuter	Singular	Dual	Plural
Nominative	aptu	aptunī	aptūni
Vocative	aptu	aptunī	aptūni
Accusative	aptu	aptunī	aptūni
Instrumental	aptunā	aptubhyām	aptubhiḥ
Dative	aptune	aptubhyām	aptubhyaḥ
Ablative	aptunaḥ	aptubhyām	aptubhyaḥ
Genitive	aptunaḥ	aptunoḥ	aptūnām
Locative	aptuni	aptunoḥ	aptuṣu

Compound aptu -

Adverb -aptu