Final answer:
The synonym for 'aim' in the sentence is 'intend'.
Step-by-step explanation:
A synonym for 'aim' in the sentence 'I didn't aim to' is 'intend'.
In this context, 'aim' means to have a specific purpose or goal in mind. By saying 'I didn't aim to', the boy is claiming that he did not intend to do what he did.
Therefore, a synonym for 'aim' in this sentence would be 'intend', which means to have as one's purpose or objective.
For example, the sentence could be rephrased as 'I didn't intend to'.