The phrase 'se suosque defendunt' translates to 'they defend themselves and their own.' This expression is connected to the use of reflexive pronouns in Latin, which are used when the subject of the verb is also the object. In this case, 'se' is a reflexive pronoun indicating that the subject is acting on themselves, while 'suos' refers to 'their own,' creating a sense of self-defense that encompasses both the individuals and their associates.