The term 'CERTAIN BURGLAR' is composed of two words: 'SAFECRACKER' and 'CAT'. A SAFECRACKER is a person who specializes in opening locked containers, such as safes, without the use of the key or combination. This type of burglary requires a high level of skill and knowledge of locks and security systems. A CAT is an animal that is often associated with thievery due to its stealthy nature and ability to sneak into small spaces. Therefore, a certain burglar could be someone who is skilled at both safecracking and sneaking around like a CAT.