Sanskrit also has a corresponding class (although not commonly termed as third), in which the so-called basic case endings are applied very regularly.
One distinguishing feature of third-declension nouns is a genitive singular ending of a short vowel and s: Latin rēg-is "of a king" Greek χειρ-ός (cheir-ós) "of a hand", and Sanskrit bhagavat-as "of the blessed (one)".
Another is a dative singular ending of i (short i in Greek, long ī in Latin): rēg-ī "for a king"; χειρ-ί (cheir-í) "for, with the hand".
Often the consonant at the beginning of certain endings undergoes a sound change with the consonant of the stem: Latin rēx "king", from rēg-s (compare the earlier-mentioned rēgis); πούς (poús) "foot", and Attic dative plural ποσί (posí) "on foot" from πόδ-ς (pód-s) and ποδ-σί (pod-sí).
Illustrative of the process is the development of the genitive singular of βασιλεύς (basileús), "king", πόλις (pólis), "city", and ἄστυ (ástu), "town":