A synthetic language is a type of language in which words are formed by combining different morphemes, which are the smallest units of meaning. These morphemes can be either prefixes, suffixes, or infixes, and they are added to a root word to indicate grammatical relationships and convey specific meanings. In synthetic languages, a single word can contain a lot of information about tense, mood, aspect, number, case, and other grammatical features. Examples of synthetic languages include Latin, Russian, and Arabic. This is in contrast to analytic languages, where words are often kept separate and word order and auxiliary words are used to convey grammatical relationships.