More about propinquity
Propinquity, “closeness in space, time, kinship,” comes via Middle English propinquite from Old French propinquite, from Latin propinquitāt-, the inflectional stem of the noun propinquitās. The English, Middle English, Old French, and Latin nouns even share the same meanings. Propinquitās is a derivative of the adjective propinquus, itself a derivative of the preposition and adverb prope “near, nearby, close.” The suffix –inquus is very rare in Latin, but it also occurs in the adjective longinquus “far, far off, remote,” the opposite of propinquus. Prope and propinquus are the positive degree whose comparative degree is the regularly formed propinquior “closer, nearer”; the superlative degree is the irregular proximus “next, next to, nearest, adjacent,” from which English derives proximate. Propinquity entered English in the first half of the 15th century.