Declension table of ?gambhīraka

Masculine	Singular	Dual	Plural
Nominative	gambhīrakaḥ	gambhīrakau	gambhīrakāḥ
Vocative	gambhīraka	gambhīrakau	gambhīrakāḥ
Accusative	gambhīrakam	gambhīrakau	gambhīrakān
Instrumental	gambhīrakeṇa	gambhīrakābhyām	gambhīrakaiḥ
Dative	gambhīrakāya	gambhīrakābhyām	gambhīrakebhyaḥ
Ablative	gambhīrakāt	gambhīrakābhyām	gambhīrakebhyaḥ
Genitive	gambhīrakasya	gambhīrakayoḥ	gambhīrakāṇām
Locative	gambhīrake	gambhīrakayoḥ	gambhīrakeṣu

Compound gambhīraka -

Adverb -gambhīrakam -gambhīrakāt