Translation of "Osity'" in Japanese

You just have to understand what sort of thing the suffix '-osity' is.

「—osity」という接尾辞がどういうものかを理解すれば良い。

'-osity' is an abstract noun word ending created from the ending of an '-ous' adjective.

「－osity」は語尾が「－ous」の形容詞から作られる抽象名詞の語尾。