Declension table of ?kupīlu

Masculine	Singular	Dual	Plural
Nominative	kupīluḥ	kupīlū	kupīlavaḥ
Vocative	kupīlo	kupīlū	kupīlavaḥ
Accusative	kupīlum	kupīlū	kupīlūn
Instrumental	kupīlunā	kupīlubhyām	kupīlubhiḥ
Dative	kupīlave	kupīlubhyām	kupīlubhyaḥ
Ablative	kupīloḥ	kupīlubhyām	kupīlubhyaḥ
Genitive	kupīloḥ	kupīlvoḥ	kupīlūnām
Locative	kupīlau	kupīlvoḥ	kupīluṣu

Compound kupīlu -

Adverb -kupīlu