Seizing suddenly is an action that can be described with two words: 'grabs' and 'NABS'. The term 'grabs' is a verb meaning to take hold of something quickly and firmly, while 'NABS' is a slang term for the same action. Both terms imply a sudden and forceful action, usually done without warning. This action can be used in many contexts, such as when someone is trying to steal something or when someone is trying to apprehend a criminal.