In the Kamakura period, end-forms of some adjectives with "shiku" conjugation took the form of "-shishi" (such as "migurushishi" or "tanomoshishi") but such a form was not generalized.
なお鎌倉時代にはシク活用の終止形に「しし」という形が見られる（「見苦しし」「たのもしし」等）が、一般化はしなかった。