Declension table of ?trisundara

Masculine	Singular	Dual	Plural
Nominative	trisundaraḥ	trisundarau	trisundarāḥ
Vocative	trisundara	trisundarau	trisundarāḥ
Accusative	trisundaram	trisundarau	trisundarān
Instrumental	trisundareṇa	trisundarābhyām	trisundaraiḥ trisundarebhiḥ
Dative	trisundarāya	trisundarābhyām	trisundarebhyaḥ
Ablative	trisundarāt	trisundarābhyām	trisundarebhyaḥ
Genitive	trisundarasya	trisundarayoḥ	trisundarāṇām
Locative	trisundare	trisundarayoḥ	trisundareṣu

Compound trisundara -

Adverb -trisundaram -trisundarāt