‘Pinda’ has several meanings but so far as the Hindu Law is concerned, it has been used in two senses;
(a) a relation connected with the same body and
(b) a relation connected through funeral oblations of food. In the Mitakshara, however, it is used in the first sense viz meaning one of the same body i.e. a blood relation. Literally, it would thus include all blood relations howsoever distant but the stages have curtailed their meaning by technical limitation and when used without qualification it signifies agnatic relations only i. e. blood relations of the same Gotra ” ” being excluded from this category as these are classed as ‘Bandhus.’ According to Mitakshara, ‘Sapinda’ relationship arises from connection with parts of the body so that a son’s Sapinda relationship with the father arises by reason of connection with the parts of the father’s body. As regards the wives, Mitakshara says that they become Sapindas of their husbands by reason of their forming one body with those of their husbands:
“similarly (arises the Sapinda relationship) of the husband with the (Patni) lawfully wedded wise; by reason of (they together) forming one body, (i e. one person hence the wife is called half the body of the husband); similarly also (arises the Sapind relationship) of the wives of brothers (with each other), by reason of (the wives forming one body reciprocally with those (i.e. their husbands) formed from one body (of their father); thus wherever the term Sapinda is used, there directly or mediately connection with parts of one body is to be understood.”
(Gopalchandra Sarkar, Sastri’s Hindu Law, sixth Edition, pages 68-79).