As collaborative and boundary-crossing forms of research, inter- and transdisciplinarity hold great potential to reframe and rename phenomena or problems that cannot be fully understood within individual perspectives. Nevertheless, a common problem within heterogeneous teams is creating mutual understanding of different concepts, perspectives and bodies of knowledge. Tis is particularly the case when tackling highly normative subjects, as is the case within sustainability sciences. In this contribution, we analyse the principles and practices behind Paulo Freire’s approach to literacy and explore their potential to develop integrative methods for conceptual work in inter- and transdisciplinary research. We identify three principles in his epistemology (words as generative, knowledge as dialogue and naming as political) and discuss how they address not just technical, but relational and political dimensions of conceptual work. We use the example of creating a joint glossary to illustrate how the principles can be operationalised.