Declension table of ?atnu

Masculine	Singular	Dual	Plural
Nominative	atnuḥ	atnū	atnavaḥ
Vocative	atno	atnū	atnavaḥ
Accusative	atnum	atnū	atnūn
Instrumental	atnunā	atnubhyām	atnubhiḥ
Dative	atnave	atnubhyām	atnubhyaḥ
Ablative	atnoḥ	atnubhyām	atnubhyaḥ
Genitive	atnoḥ	atnvoḥ	atnūnām
Locative	atnau	atnvoḥ	atnuṣu

Compound atnu -

Adverb -atnu