In English the singular is used when modifying another noun like that. For example, a trainer of dogs is a dog trainer, opener of cans is a can opener, a podiatrist a foot doctor, a ball you kick with your feet is a football, etc.
The real question is why does english persist with so many different ways to make plural words
Why isn't it called a teethbrush?
In English the singular is used when modifying another noun like that. For example, a trainer of dogs is a dog trainer, opener of cans is a can opener, a podiatrist a foot doctor, a ball you kick with your feet is a football, etc.
The real question is why does english persist with so many different ways to make plural words
If you have multiple toothbrush you have teethbrush, like lieutenants-general
you don't have a seperate brush for each tooth? fucking commies smh
Stalin ate all of the teethbrushes himself so now we're left with toothbrushes (which we have to share because communism)