Derived from the root ‘prī’ (to propitiate, to gain favour), the word ‘Āprī’ refers to a group of invocatory hymns belonging to the class of ‘yājyās’ (formulae of consecration). There are ten Āprī-sūktas in the Ṛgveda (1.13; 1.142; 1.188; 2.3 and so on). The yajamāna (sacrificer) has to choose from these verses according to his gotra (lineage). They are recited in the Paśubandha sacrifices.
Chanting of these hymns will please the concerned deities and they confer boons on the sacrificer. The deities appear to be personified objects belonging to the sacrifice, like the fuel, the sacrificial grass, the enclosure and so on, all regarded as different forms of Agni, the fire-god.