(Latin, "old man"). Associated with attitudes that come with advancing age. Negatively, this can mean cynicism, rigidity and extreme conservatism; positive traits are responsibility, orderliness and self-discipline. A well-balanced personality functions appropriately with the puer-senex polarity.

Senex is Latin for old man. In Ancient Rome, the title of Senex was only awarded to elderly men with families who had good standing in their village.