more difficult
Definitions
Requiring greater effort, skill, or intelligence to accomplish or understand.
Presenting a higher degree of complexity, hardship, or resistance.
Examples
Learning a new language becomes more difficult as you get older.
The final exam was significantly more difficult than the practice test.
Synonyms
harder more challenging more arduous more taxing more demanding more strenuous more formidable
Antonyms
easier simpler less challenging more manageable less demanding more straightforward less arduous