Compound refers to the process of combining words or word groups to form a new word. In a compound, there are two parts - the fore part (first part) and the hind part (second part). Compounding and decomposition are the two processes involved - compounding combines word groups to form a compound word, while decomposition breaks down a compound word. Examples of compounds and their decompositions are given such as 'djdey' from 'dj' and 'dey'. Compounds differ from combinations in that the former combines words while the latter combines syllables.