Yajna
यज्ञ (yajna)
Sacrifice or offering - the ritual act of giving something up in order to sustain a larger order.
Yajna, usually translated as sacrifice, describes a structured offering, historically centered on fire, in which something valued is given up in service of a larger cosmic or communal order.
The Gita extends the term well past its ritual origin, describing any disciplined action performed without personal grasping as a form of yajna. Cooking a meal, doing one's work, or simply living attentively can, in this reading, become sacrificial in the technical sense: an offering rather than a purely self-interested transaction.
This extension matters because it moves yajna out of the fire pit and into ordinary life, suggesting that the structure of sacrifice - give something real, hold nothing back, expect no private return - is available to almost any action, not only to formal ritual.