Slavic languages - Indo-European, Dialects, Grammar: A number of features set off Slavic from other Indo-European subgroups. The Slavic languages are an unusually numerous yet close-knit subgroup. On the whole, Slavic auxiliary words tend to be unstressed and to be incorporated into a single phonetic group or phrase with an autonomous stressed word. Inflection (i.e., the use of endings, prefixes, and vowel alternations) has persisted as the main method of differentiating grammatical meanings,...