Singular
* Nominative: śiśuḥ (शिश्ुः)
* Accusative: śiśum (शिश्ुम्)
* Instrumental: śiśunā (शिश्ुना)
* Dative: śiśave (शिश्वे)
* Ablative: śiśor (शिश्ोः)
* Genitive: śiśoḥ (शिश्ोः)
* Locative: śiśau (शिश्ौ)
Plural
* Nominative: śiśavāḥ (शिश्ुवाः)
* Accusative: śiśūn (शिश्ून)
* Instrumental: śiśubhiḥ (शिश्ुभिः)
* Dative: śiśubhyaḥ (शिश्ुभ्यः)
* Ablative: śiśuṣu (शिश्ुषु)
* Genitive: śiśūnām (शिश्ूनाम्)
* Locative: śiśuṣu (शिश्ुषु)
Notes:
* The vocative case (addressing someone) is the same as the nominative: śiśuḥ (शिश्ुः)
* This declension follows the "a" stem pattern of nouns.
The shabdarūpī shows the various forms a word takes depending on its function in a sentence. Understanding shabdarūpī is crucial for constructing grammatically correct Sanskrit sentences.