the word 'topper' is a transparent english compound built from the native germanic root 'top' and the agentive suffix '-er'. the old english noun 'topp' originally referred to the highest point, such as a summit or the tuft of hair on the head, a meaning retained in its modern sense. the suffix '-er', also of germanic heritage, is one of the most productive in english for creating nouns that denote an agent or instrument. therefore, the literal construction "one who or that which tops" logically gave rise to its various modern applications, from a person who excels to a hat that sits atop the head or a decorative item placed on top of something else.

Structure: top (highest part) + er (agent/instrument suffix) top (from old english 'topp', meaning summit or tuft of hair; germanic origin). er (agentive suffix from old english '-ere', from proto-germanic '-ārijaz', used to form nouns denoting a person or thing that performs an action).