Concept:
A novice is a person who is new to a field, profession, activity, or skill. Such a person lacks experience and is still learning the basics.
Step 1: Understand the sentence.
The speaker says:
I cannot do this work.
This indicates a lack of experience or expertise.
Step 2: Define the word "novice".
A novice is:
• a beginner
• a newcomer
• an inexperienced person
• someone who is learning a skill
Step 3: Compare the options.
• Experienced: Having knowledge gained through practice.
• Skillful: Having developed expertise.
• Idler: A lazy person who avoids work.
• Beginner: A person starting to learn something.
The correct synonym of novice is beginner.
Therefore,
\[
\boxed{\text{Beginner}}
\]