Where does “deurhamer” come from?
deurhamer (Dutch) comes from Dutch hamer, from Middle Dutch hāmer, from Old Dutch hamar, from Proto-West Germanic *hamar, from Proto-Germanic hamaraz, from Proto-Indo-European h₂eḱmoros, from Proto-Indo-European h₂éḱmō, from Proto-Indo-European h₂eḱ- — sharp.
deurhamer (Dutch): doorknocker
Ancestry of “deurhamer”, step by step