There are various synonyms for the phrase "recurring day after day." Some of these include repetitive, monotonous, routine, tedious, familiar, uninspiring, and uneventful. These terms typically denote a sense of uniformity or monotony, suggesting something that fails to vary or offer any excitement. Whether describing mundane tasks like daily chores or unvarying routines like work schedules, these words capture the feeling of being trapped in a cycle of sameness. While this kind of consistency can be comforting, it can also feel stifling and limit opportunities for growth and change.