Answer: The word "stealthy" in the sentence provided means cautious and careful.
Step-by-step explanation: The word "stealthy" is an adjective and it is mainly used to describe someone as quiet and cautious in order to go unnoticed and; therefore, not be heard nor seen. In the sentence "The stealthy cat tiptoed through the house so nobody would hear her", "stealthy" refers to the cat as an animal that is quiet and careful with its movements in order to go under the radar and avoid being noticed.