Using 'repetitious' can hint at boredom or lack of creativity; it's often negative in context. The book was dull and repetitious, with the same phrases in every chapter.
Pro Tip 2/3
Spotting Redundancy
'Repetitious' is used to point out unnecessary repetition that doesn't add value or meaning. The manual was repetitious, stating the same warnings on multiple pages.
Pro Tip 3/3
Conveying Annoyance
Describing something as 'repetitious' often expresses annoyance or frustration with the repetition. His repetitious apologies began to irritate her, as he kept making the same mistakes.