Sanskrit nouns

Sanskrit is a highly inflected language with three grammatical genders (masculine, feminine, neuter) and three numbers (singular, plural, dual). It has eight cases: nominative, vocative, accusative, instrumental, dative, ablative, genitive, and locative.

Nouns are grouped into "declensions", which are sets of nouns that form their cases in a similar manner. In this article they are divided into five declensions. The declension to which a noun belongs is determined largely by form.

Sanskrit nouns have eight cases: nominative, accusative, instrumental, dative, ablative, genitive, locative, and vocative. Of these eight cases, Pāṇini identified six as kārakas, or accessories to a verb. The six kārakas are the nominative, accusative, dative, instrumental, locative, and ablative cases. He defined them as follows (Ashtādhyāyi, I.4.24-54):

Pāṇini failed to identify the genitive (Sambandha) and vocative (sambuddha) as cases.

The basic scheme of suffixation is given in the table below and applies to many nouns and adjectives. However, according to the gender and the final consonant or vowel of the uninflected word-stem, there are sandhi rules dictating the form of the inflected word.

...
Wikipedia