expression, godan verb (-ru)
perform memorial rites for one's ancestors
A fixed expression referring to traditional Japanese ancestor veneration, typically involving offerings, prayers, and ceremonies at home altars or graves.
お盆には家族で祖先の霊を祭る。
During Obon, the family performs rites for the spirits of their ancestors.
先祖供養 is a broader noun meaning 'ancestor memorial services', while 祖先の霊を祭る is a verb phrase specifically describing the act of performing those rites.
A transparent compound of 祖先 (ancestor), 霊 (spirit), and 祭る (to enshrine or worship). The phrase follows standard Japanese syntax and has no obscure historical derivation.