The various facets of the strongly sexual nature of the god Seth are widely evoked in the Egyptian sources ever since the oldest traditions. Therefore, it is surprising that among the numerous names of the god none seems to state clearly this distinctive feature. This analysis concerns the term nhr, one of Seth’s names which is mainly attested in the Book of protecting the boat-nechemet, and commonly rendered as “the miserable” or “the terrifying”. The enquiry seems to reveal a semantic field which rather refers to the strong sexual nature of the god.