polifidelidad -> πολυπιστότητα
Polyfidelity is a form of non-monogamy, an intimate relationship structure where all members are considered equal partners and agree to restrict sexual activity to only other members of the group.
https://en.wikipedia.org/wiki/Polyfidelityca: polifidelitat; en: polyfidelity; eo: plurfideleco; es: polifidelidad; ru: поливерность; sh: viševjernost