Declension table of ?sāyudha

Masculine	Singular	Dual	Plural
Nominative	sāyudhaḥ	sāyudhau	sāyudhāḥ
Vocative	sāyudha	sāyudhau	sāyudhāḥ
Accusative	sāyudham	sāyudhau	sāyudhān
Instrumental	sāyudhena	sāyudhābhyām	sāyudhaiḥ sāyudhebhiḥ
Dative	sāyudhāya	sāyudhābhyām	sāyudhebhyaḥ
Ablative	sāyudhāt	sāyudhābhyām	sāyudhebhyaḥ
Genitive	sāyudhasya	sāyudhayoḥ	sāyudhānām
Locative	sāyudhe	sāyudhayoḥ	sāyudheṣu

Compound sāyudha -

Adverb -sāyudham -sāyudhāt