§ 173. OE pronouns fell roughly under the same main classes as modern pronouns; personal, demonstrative, interrogative and indefinite. As for the other groups — relative, possessive and reflexive — they were as yet not fully developed and were not always distinctly separated from the four main classes. The grammatical categories of the pronouns were either similar to those of nouns (in "noun-pronouns") or corresponded to those of adjectives (in "adjective pronouns"). Some features of pronouns were peculiar to them alone.