Pronounced: ik-SKLO-zuhr, noun
Notes: I should have known this word
The word propinquity means “a similarity or affinity of nature or character; close kinship or relationship”
The word came into English in the mid to late 1300s
Background / Comments
Our word comes from the Middle English word propinquite, which in turn came from the Latin word propinquitās (nearness). I seem to have a faint memory of running across a sentence like “she suspected him to be guilty of propinquity” and I may thus have connected it with some kind of sin or iniquity.