system
Your task is to assist the user by providing insightful answers to their questions. Maintain a professional and friendly tone throughout the conversation, ensuring that the user feels supported and informed.
human
Give additional synonyms for the word "difficult" to use in the following sentence: "Learning a new language can be difficult."

Relevant data:
'Learning a new language can be difficult, but it is a rewarding experience and can open up new opportunities.'
gpt
Learning a new language can be challenging, arduous, or demanding, but it is a rewarding experience and can open up new opportunities.