The term 'Trunk Splitter' refers to a tool used for splitting logs. It is also known as an AXE, which is a three-letter word that can be used to solve the crossword. An AXE is a tool consisting of a heavy metal head mounted on a handle, and it is used for chopping wood or other materials. It is a versatile tool that can be used for a variety of tasks, such as splitting logs, cutting down trees, and even self-defense.