The Compounds

"Compound"
is an English word or expression which meaning is a combination between the meanings of
two or more elements.

In grammar, it has the same meaning, but its elements are words. In the examples above, each compound has two elements (two words), but it can be more than two ones. Generaly, compounds with more tham two elements has hyphens between each of two elements. Some examples of compounds with more tham two components: "day-by-day", "day-after-day", "son-in-law", etc. In lingusitics, a compound is a "lexeme" (a meaningful unit of a language) with more tham one stem. A stem is a part of a word. In a compound, a stem is a complete word that is part of the word. For example, in "catfish", "cat" and "fish" are two complete words that are parts of another complete word ("catfish"). The meaning of the compound is always very different from the meanings of its components in isolation. 

The ralationship between the elements of a compound may be marked with a case or other morpheme. Because of this, there are noun-noun compounds, verb-noun compounds and verb-verb compounds. A noun-noun compound is a compound with to nouns. Noun-noun compounds are compounds as that of the examples in the box above the tis text.
A verb-noun compound is a compound with a verb and its object. The argument of the verb is incorporated into de verb, with is usually turned into a gerund. Examples: "breastfeeding", "freewriting", "outlining", etc. 
A verb-verb compound is a sequence of more than one verb acting toghether to determine clause structure. It can be a serial verb or a compound verb. It is a serial verb if two sequential ations are expressed in a single cause. For example: "to be going" ("I am going home.", "She was going to the church in that moment.", etc.

In the next post: "Compound Verbs".