Declension table of ?rathāhnya

Neuter	Singular	Dual	Plural
Nominative	rathāhnyam	rathāhnye	rathāhnyāni
Vocative	rathāhnya	rathāhnye	rathāhnyāni
Accusative	rathāhnyam	rathāhnye	rathāhnyāni
Instrumental	rathāhnyena	rathāhnyābhyām	rathāhnyaiḥ
Dative	rathāhnyāya	rathāhnyābhyām	rathāhnyebhyaḥ
Ablative	rathāhnyāt	rathāhnyābhyām	rathāhnyebhyaḥ
Genitive	rathāhnyasya	rathāhnyayoḥ	rathāhnyānām
Locative	rathāhnye	rathāhnyayoḥ	rathāhnyeṣu

Compound rathāhnya -

Adverb -rathāhnyam -rathāhnyāt