In this paper I identify a distinct form of epistemic injustice and oppression which I call ‘hermeneutical sabotage’. Hermeneutical sabotage occurs when dominantly situated knowers actively maintain or worsen the dominant hermeneutical resources for understanding the experiences or identities of marginalised groups. They do this through actively distorting the resistant hermeneutical resources developed by marginalised groups, and by introducing new, prejudiced hermeneutical resources. I develop a taxonomy of four forms hermeneutical sabotage can take, giving an example of each, and explain (...) the difference between ‘hermeneutical sabotage’ and other types of epistemic injustice. I demonstrate the importance of having the concept of hermeneutical sabotage for recognising how it can be used, intentionally or unintentionally, to further the aims of harmful political movements. I give examples of hermeneutical sabotage which furthers the aims of transphobic, racist, and anti-immigrant political movements. (shrink)