Declension table of ?samādhin

Masculine	Singular	Dual	Plural
Nominative	samādhī	samādhinau	samādhinaḥ
Vocative	samādhin	samādhinau	samādhinaḥ
Accusative	samādhinam	samādhinau	samādhinaḥ
Instrumental	samādhinā	samādhibhyām	samādhibhiḥ
Dative	samādhine	samādhibhyām	samādhibhyaḥ
Ablative	samādhinaḥ	samādhibhyām	samādhibhyaḥ
Genitive	samādhinaḥ	samādhinoḥ	samādhinām
Locative	samādhini	samādhinoḥ	samādhiṣu

Compound samādhi -

Adverb -samādhi