In idiomatic speech, the of class 5, the of class 7, and the of classes 8 and 10 are sometimes not rendered when the noun is followed by the appropriate concords. Some historical words, such as ('locust'), have completely lost their singular prefixes (and, in the case of , ended up in class 9). Others, such as ('family') are often rendered without the prefix even when not followed by any prefixes ("at my/the home" is always ). The class 5 noun ('next year') has completely lost its prefix, and has plural .