x1 is a secondary meaning of x2; x1 is an indelible connotation/subtext of word/phrase x2
Coined by mungojelly (la lunbe): "A plisesumu is an implicit meaning that piggybacks along with the main meaning of something, asserting unrelated things in a way that's difficult to extract & deny." Refers to a specific kind of subtle, unintentional connotation, often visible in the shape or etymology of a word itself.