Which word best describes an object that is likely to break, snap, or crack easily?

The term that best describes an object that is prone to breaking, snapping, or cracking easily is "brittle." This word specifically refers to materials or items that, while they may be hard or rigid, lack the ability to absorb energy without fracturing. Brittle objects tend not to deform significantly before failure and are known for their tendency to shatter or break under stress, in contrast to ductile materials that can bend or stretch.

The other terms do not relate to the physical properties of an object in the same way. For example, "benevolent" refers to a disposition to do good or show kindness; "cantankerous" describes someone who is bad-tempered and difficult to deal with; and "blatant" refers to something that is very obvious or conspicuous in behavior or characteristics. Thus, they do not connect to the concept of fragility or susceptibility to breaking.