| Singular | Dual | Plural |
| Nominative |
कठोरहृदयः
kaṭhorahṛdayaḥ
|
कठोरहृदयौ
kaṭhorahṛdayau
|
कठोरहृदयाः
kaṭhorahṛdayāḥ
|
| Vocative |
कठोरहृदय
kaṭhorahṛdaya
|
कठोरहृदयौ
kaṭhorahṛdayau
|
कठोरहृदयाः
kaṭhorahṛdayāḥ
|
| Accusative |
कठोरहृदयम्
kaṭhorahṛdayam
|
कठोरहृदयौ
kaṭhorahṛdayau
|
कठोरहृदयान्
kaṭhorahṛdayān
|
| Instrumental |
कठोरहृदयेन
kaṭhorahṛdayena
|
कठोरहृदयाभ्याम्
kaṭhorahṛdayābhyām
|
कठोरहृदयैः
kaṭhorahṛdayaiḥ
|
| Dative |
कठोरहृदयाय
kaṭhorahṛdayāya
|
कठोरहृदयाभ्याम्
kaṭhorahṛdayābhyām
|
कठोरहृदयेभ्यः
kaṭhorahṛdayebhyaḥ
|
| Ablative |
कठोरहृदयात्
kaṭhorahṛdayāt
|
कठोरहृदयाभ्याम्
kaṭhorahṛdayābhyām
|
कठोरहृदयेभ्यः
kaṭhorahṛdayebhyaḥ
|
| Genitive |
कठोरहृदयस्य
kaṭhorahṛdayasya
|
कठोरहृदययोः
kaṭhorahṛdayayoḥ
|
कठोरहृदयानाम्
kaṭhorahṛdayānām
|
| Locative |
कठोरहृदये
kaṭhorahṛdaye
|
कठोरहृदययोः
kaṭhorahṛdayayoḥ
|
कठोरहृदयेषु
kaṭhorahṛdayeṣu
|