ke- + saling + -an
kesalingan (plural kesalingan-kesalingan, first-person possessive kesalinganku, second-person possessive kesalinganmu, third-person possessive kesalingannya)
kesalingan (plural kesalingan-kesalingan, informal first-person possessive kesalinganku, informal second-person possessive kesalinganmu, third-person possessive kesalingannya)