Halliday & Matthiessen (2014: 387):
Interpersonal meanings are embodied (a) in the person system, both as pronouns (person as Thing) and possessive determiners (person as Deictic); (b) in the attitudinal type of Epithet; (c) in connotative meanings of lexical items functioning in the group, and (d) in prosodic features such as swear-words and voice quality.