relationship
/rɪˈleɪʃənʃɪp/ noun
BEHAVIOUR [C] › the way two people or groups feel and behave towards each other: He has a very good relationship with his older sister. ROMANTIC [C] › a sexual or romantic friendship: I don't feel ready for a relationship at the moment. CONNECTION [C, U] › a connection between two or more things: the relationship between sunburn and skin cancer