What Is the Ending of Oxen?

S and e s represent the same ending. It's hard to add an s to words like bush and witch without putting a vowel in between. But notice that modern english has retained a lot of those old forms. So why didn't those forms become mans or foots or mouses? Well the answer may lie in the fact that forms didn't really rely upon inflectional endings to make the plural. This other group of words nt have plural endings. They had their own internal system, so there was no particular reason to add an ending to them.