The methodological focus of this study is determining the course of research: the analysis of the argumentation in verbal sparring and of figures of speech, defined as sense-forms, in Bernard-Marie Koltès’ five theatrical plays. These two main approaches make it possible to highlight the theatricality and the dramaticity of words of struggle that establish scenes of agon in contemporary theatre. These reflections, which also take into account the intrascenic and extrascenic perspectives inherent in theatrical double enunciation, aim to deepen the understanding of the works of Koltès in their particular relation with the spectator. All language efforts made by characters in confrontations, as well as various argumentative and figurative strategies, prove to be in vain and always lead to a final non-communication, creating a mixture of the tragic and the comic throughout the plays. This is what is at stake in our work: to define Koltèsian dramaturgy as a confrontation and a cohabitation of agonal words.